Question

Solve this system of equations
plz help

Answer 1

x = 10; y = 30

Explanation:

1. Plug the 3x from the first equation into the second equation to substitute the y.

-1/2x + 35 = 3x.

2. Subtract 3x from both sides. Then subtract 35 from both sides.

-7/2x = -35

3. Multiply by the reciprocal

x = 10

4. Plug in 10 as the x in the first equation

y = 3(10)

y = 30

Answer 2

(10,30)

x=10

y=30

Explanation:

Looking at the first one we know exactly what y is equal to in terms of x so whenever we need a y in the second equation we can just replace it with 3x which means we have

-.5x+35=3x

Solve for x and get

35=3.5x

10=x

We can then plug this x value into the first equation and solve for y

y=10*3

y=30

our answer is therefore (10,30)