Question

Problem 1) Y=-x+4 Y=3x Problem 2) Y=2x-10 2y=x-8 Problem 3)2y=x+1-2x-y=7

Answer 1

Problem 1)

The given equations are

y = -x + 4

y = 3x

We would substitute y = 3x into y = -x + 4. It becomes

3x = - x + 4

Adding x to both sides of the equation, we have

3x + x = - x + x + 4

4x = 4

Dividing both sides of the equation by 4, we have

4x/4 = 4/4

x = 1

Substituting x = 1 into y = 3x, we have

y = 3 * 1

y = 3