Question

Solve y=x+4
y=3x−1 to get the solution

Answer 1

6

Explanation:

x = 2 y = 6 Explanation: y = 3 x (1) y = x + 4 (2) Subtracting (1) - (2): 0 = 2 x − 4 2 x = 4 x = 4 2 = 2 y = 3 × 2 = 6

Answer 2

x = 2.5

y = 6.5

Explanation:

You can solve this by setting the two equations equal to each other, like so:

x + 4 = 3x - 1

Subtract x from both sides:

x + 4 = 3x - 1

-x - x

__________

4 = 2x - 1

Add 1 to both sides:

4 = 2x - 1

+1 + 1

_________

5 = 2x

Divide by 2:

2.5 = x

Plug in 2.5 for x into the equation:

y = x + 4

y = 2.5 + 4

y = 6.5