Exercise 13 Page 40

To solve the given literal equation for x, we will use the Properties of Equality to apply inverse operations on the equation. Remember, only like terms can be combined.

y=4x+8x

AddTerms

Add terms

y=12x

DivEqn

.LHS /12.=.RHS /12.

y/12=12x/12

CalcQuot

Calculate quotient

y/12=x

OneMult

1* a=a

1* y/12=x

MovePartNumRight

a* b/c=a/c* b

1/12y=x

RearrangeEqn

Rearrange equation

x=1/12y