Question

Use the substation to solve the system of equations. Y=x+1.75 4x-2y=4

Answer 1

So we need to plug in y into our equation so our new equation is:

4x - 2(x+1.75) = 4

first lets distribute the 2 by multiplying the values inside the parentheses by 2

4x - 2x + 3.5 = 4

4x - 2x = 2x

so now our equation is 2x + 3.5 = 4

we need to get x by itself on one side of the parentheses so lets move the 3.5 by subtracting by 3.5 on both sides

2x + 3.5 = 2x
4 - 3.5 = .5

new equation: 2x = .5

now to get rid of this 2 (being multiplied by x) we simply have to do the opposite - divide by 2 on each side

2x/2 = x
.5/2 = .25

so our x value is equal to .25!

if you have any questions about how i answered this question please let me know:)