Answer:
x¹⁵
Step-by-step explanation:
x¹² × x³
x^(12+3)
<u>Step 1: Simplify</u>
<u />
9a - 8 = 2a - 2b
7a - 8 = -2b
7a = 8 - 2b
a = (8 - 2b)/7
66
55+59 =114
180-114=66