Question

What is the value of a y in the equation 6.4x+2.8y=44.4 when x=3

Answer 1

ANSWER: y=9

First substitute x

6.4(3)+2.8y=44.4

19.2+2.8y=44.4

subtract 19.2 from both sides

2.8y=25.2

divide by 2.8 on both sides

y=9