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3a7=263a-7=26

Full solution

Q. 3a7=263a-7=26
  1. Add 77 to isolate variable: Add 77 to both sides to isolate the term with the variable.\newline3a7+7=26+73a - 7 + 7 = 26 + 7\newline3a=333a = 33
  2. Divide by 33 to solve: Divide both sides by 33 to solve for aa.3a3=333\frac{3a}{3} = \frac{33}{3}a=11a = 11