Question

1.5+4/5a=21 Solve what a equals

Answer 1

Is that 1.5 or question #1 that starts with .5? And is the a in the numerator or denominator. You should use parentheses to show the problem. I will assume the question is

1.5 + (4a/5) = 21
multiply by 6
1.5*5 + 5(4a/5) = 5*21
7.5 + 20a = 105
move 7.5 to right side
20a = 105 - 7.5
combine terms
20a = 97.5
divide both sides by 20
20a/20 = 97.5/20
a = you can divide it on your calculator.