Question

20. Find the value of the variable y in the equation –5.7 + y = 8.2. A. –2.5 B. 2.5 C. –13.9 D. 13.9

Answer 1

`\huge\boxed{D.\ 13.9}`

Explanation:

`-5.7+y=8.2\qquad|\text{add 5.7 to both sides}\\\\-5.7+5.7+y=8.2+5.7\\\\y=13.9`