Solve.Be careful to examine work to see if the equation has no solution or an infinite number of solutions A) -1+5(x-2)=12x+3-7x  B)9(x+3)-6=24-2x-3+11x

2 Answers | Add Yours

embizze's profile pic

embizze | High School Teacher | (Level 2) Educator Emeritus

Posted on

(a) Solve -1+5(x-2)=12x+3-7x

Use the distributive property to clear the parantheses:

-1+5x-10=12x+3-7x      Add(collect) like terms on both sides

5x-11=5x+3         Subtract 5x from both sides

-11=3 which is not true for any value of x.

There is no solution to the equation.

(b) Solve 9(x+3)-6=24-2x-3+11x  Again use the dist. prop.

9x+27-6=24-2x-3+11x  Add like terms

9x+21=9x+21  Subtract 9x from both sides

21=21  This is true for all values of x.

spikey-shot's profile pic

spikey-shot | Student, Grade 9 | (Level 2) eNoter

Posted on

A. -1+5x-10=12x+3-7x


There is no solution offered.


B. 9x+27-6=24-2x-3+11x

9x+21 = 21+9x

infinite number of solution since LHS = RHS

We’ve answered 319,812 questions. We can answer yours, too.

Ask a question