Answer:
Explanation:
21) 64=8(r+2)
Step 1: Simplify both sides of the equation.
64=8(r+2)
64=(8)(r)+(8)(2)(Distribute)
64=8r+16
Step 2: Flip the equation.
8r+16=64
Step 3: Subtract 16 from both sides.
8r+16−16=64−16
8r=48
Step 4: Divide both sides by 8.
8r
8
=
48
8
r=6
29) Step 1: Simplify both sides of the equation.
−4(r+6)=−63
(−4)(r)+(−4)(6)=−63(Distribute)
−4r+−24=−63
−4r−24=−63
Step 2: Add 24 to both sides.
−4r−24+24=−63+24
−4r=−39
Step 3: Divide both sides by -4.
and you get r= 39\4
hope that helps