Question

PLEASE HELP IM TIMES AND EXPLAIN STEP BY STEP , so using substitution method solve the system of equations , y = 2x + 8 and y = 4x - 2 , whoever answers step by step gets brainliest

Answer 1

Answer:

y= 2x + 8 , y = 4x - 2

2x + 8 = 4x - 2

8 = 2x - 2

10 = 2x

5 = x

Step-by-step explanation:

Answer 2

Answer:

x = 5

Step-by-step explanation:

y = 2x + 8

substitute the y in the other expression with this expression (you can do it vise versa too but i chose this because it was first)

2x + 8 = 4x - 2

goal is to isolate the variable

add 2 to both sides (this cancels out the -2 on the right side)

2x + 8 + 2 = 4x - 2 + 2

2x + 10 = 4x + 0

2x + 10 = 4x

subtract -2x from both sides (cancels out the 2x on the left side)

2x - 2x + 10 = 4x - 2x

0x + 10 = 2x

10 = 2x

divide both sides by 2 (cancels out the 2 on the right side)

10 ÷ 2 = 2x ÷ 2

5 = 1x

5 = x

variable is isolated and tells us that x = 5