Question

FLUENCY 1. Solve the following equations for x using inverse operations. (b) x+2 =-2 3 (c)-x+2=7 5 ***+2=7 (a) 7x-15=1 4

Answer 1

a) To solve this equation we are going to use inverse operations as addition and subtraction are inverse operations, also multiplication and division are inverse operations, so:

7x-15=1

7x=1+15

7x=16

x=16/7

b)

`\begin{gathered} (x+2)/(4)=-2 \\ x+2=-2(4) \\ x+2=-8 \\ x=-8-2 \\ x=-10 \end{gathered}`

c)

`\begin{gathered} -(3)/(5)x+2=7 \\ -(3)/(5)x=7-2 \\ -(3)/(5)x=5 \\ -3x=5(5) \\ x=-(25)/(3) \end{gathered}`