Solve for b:  -86 x b = 43

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kjcdb8er's profile pic

kjcdb8er | Teacher | (Level 1) Associate Educator

Posted on

In this equation, b is the variable that we need to isolate. To do that, divide both sides of the equation by the value in front of the b, -86. Since anything divided by itself is 1, and 1 times X is X, we can isolate b.

-86 x b = 43

(-86) / (-86) x b = 43 / (-86) = 1/(-2)

b = - 1 / 2

malkaam's profile pic

malkaam | Student, Undergraduate | (Level 1) Valedictorian

Posted on

-86 x b = 43 -------eq(i)

The value of b is unknown here therefore we should isolate b

-86 x b = 43

-86b/-86=43/-86                (dividing both sides by 86)

b=-0.5

In order to be sure input the value of b into eq(i)

-86 x b = 43

-86 x -0.5=43

 43=43

LHS=RHS

givingiswinning's profile pic

givingiswinning | Student, Grade 10 | (Level 1) Valedictorian

Posted on

-86 x b = 43

-86b = 43

divide by -86

b = 43/-86 

b = -1/2 or -.5

taangerine's profile pic

taangerine | Student, Grade 12 | (Level 1) Valedictorian

Posted on

 -86 x b = 43

Rewrite equation

  • -86(b)=43

Since '(-86)(b)' is multiplication, what is the opposite operation for it? (Division)-- To isolate the variable 'b', divide both sides by -86. 

  • `(-86b)/-86 = 43/-86`

Simplify 

  • b=`-1/2`
nisarg's profile pic

nisarg | Student, Grade 11 | (Level 1) Valedictorian

Posted on

-86 x b = 43

b=43/-86       divide both sides by -86

b=-1/2            after you simplify the fraction

jess1999's profile pic

jess1999 | Student, Grade 9 | (Level 1) Valedictorian

Posted on

-86 x b = 43

In this equation, we have to try to get " b " alone. In order to do that divide by -83 on both sides.

By dividing by -83 on both sides your equation should be

b = -43/86 simplify this fraction

By simplifying your fraction would be

b = 1/2 which is your answer

acompanioninthetardis's profile pic

acompanioninthetardis | Student, Undergraduate | (Level 1) Valedictorian

Posted on

-86b=43

So you want to isolate the b by itself in order to figure out its value. To do this we mist get rid of the -83 by dividing both sides by -83. So you get

b= -43/86

Then you simplify. Resulting in 

b=- 1/2.  As your answer

yanet2003's profile pic

yanet2003 | Middle School Teacher | eNotes Newbie

Posted on

When you are solving equations you have to think of a balance scale what you do to one side you must to the other side of the equal sign.  The goal is to ge the variable (b) alone on one side of the equal sign.

 

-86 x b = 43   

b= 43 / -86

b= -0.05

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