How do you solve for y if y= - 3x +2 when x = -1 and x=4?

1 Answer
Nov 13, 2017

y=5 and y=-10

Explanation:

When it comes to 2 variable linear equations, it's as simple as plugging in the given values and following the order of operations. In this case, you are given two x values and are asked to solve for y.

First, you'll take one of your given values (x=-1) and plug it into the first formula, which is already solved for y (y=-3x+2).

y=-3(-1) + 2

Then follow the order of operations, remembering that two negatives equal a positive when multiplied.

y=3 + 2
y = 5

Repeat the steps for the first 2nd given value (x=4).

y=-3(4) + 2
y=(-12) + 2
y=-10

Hopefully this helps!