Question

Solve the following equation. Show all your work.

21.3=x+5.1

Answer 1

Solve 21.3 = x + 5.1 for x.

Step 1 — isolate x: subtract 5.1 from both sides
21.3 − 5.1 = x + 5.1 − 5.1

Step 2 — simplify
21.3 − 5.1 = x
(21 − 5) + (0.3 − 0.1) = x
16 + 0.2 = x
x = 16.2

Check: 16.2 + 5.1 = 21.3, so the solution is correct.

Answer: x = 16.2