Question

3.2x-1.8y+7.7=0

Need help solving

Answer 1

y = 1.78x + 4.28

Explanation:

first isolate y

1.8y = 3.2x + 7.7

now that y is isolated, we can divide out the 1.8

y = 1.78x + 4.28

Answer 2

`y=(16)/(9)x + (77)/(18)`

Explanation:

To solve for y in this equation, we need to isolate the y term on one side, then multiply by the reciprocal of its coefficient. Remember that any number multiplied by its reciprocal is 1.

3.2x - 1.8y + 7.7 = 0

↓ add 1.8y to both sides

3.2x + 7.7 = 1.8y

↓ represent the decimals as fractions

`(16)/(5)x + (77)/(10) = (9)/(5)y`

↓ multiply by the reciprocal of y's coefficient:
`(5)/(9)`

`(5)/(9) \cdot \left((16)/(5)x + (77)/(10)\right) = \left((9)/(5)y\right) \cdot (5)/(9)`

↓ simplify

`\boxed{(16)/(9)x + (77)/(18) = y}`