45-2а=28

Solve for a:

Given 45 − 2a = 28

• Move terms: −2a = 28 − 45 = −17
• Divide by −2: a = (−17)/(−2) = 17/2 = 8.5

Check: 45 − 2*(17/2) = 45 − 17 = 28.

Answer: a = 17/2 (or 8.5).