CPM Homework Help : CCA Problem 1-40

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Home > CCA > Chapter 1 > Lesson 1.2.1 > Problem 1-40

1-40.

Solve the equations below for $x$ and check your solutions.

Hint:
Look at problem 1-36 earlier in this lesson for steps in solving these kinds of problems.

$−6+10x=x+12$

Answer(a):
$x=2$
Check(a):
Substitute the answer back into the original equation to make sure it works.
$−6+10(2)=(2)+12$
$−6+20=2+12$
$14=14$

It works!

$10+5x=2x−11$

$−9x=−3x+18$

$2x−9=−7x$

Answer(d):
$x=1$
Refer to part (a).

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