2/3r-25=115

Question

Solve Equation, write a justification for each step, and check solution.

Answer 1

(2/3)r-25=115

(2/3)r-25+25=115+25

(2/3)r=140

multiply both sides by the reciprocal of 2/3 which is 3/2

(3/2)(2/3)r=(3/2)(140)

r=3*70  (140/2=70, you simplify before you multiply)

r=210

I'll leave the check to you.