Answer:
A. 52=10x+7
X=9/2=4.5
Explanation:
10x+7=52 (Switch sides.)
10x+7-7=52-7 (Subtract 7 from both sides.)
52-7 (Solve.)
52-7=45
10x=45
10x/10=45/10 (Divide by 10 from both sides.)
45/10 (Solve & simplify.)
45/10=9/2
x=9/2=4.5
So, the correct answer is (A.) 52=10x+7 and x=9/2=4.5.