Answer:
-4
Step-by-step explanation:
y=x-7
plug in 3
y=3-7
y=-4
0.0987
x = 5
3x - 7 + 4x = 28
Combine like terms
7x -7 = 28
Add 7 to each side
7x - 7 +7 = 28+7
7x = 35
Divide each side by 7
7x/7 = 35/7
Answer:2600
