Therefore, y = 4
7 + 2y = 15
7-7 + 2y = 15-7 Subtract 7 from both sides
2y = 8 Divide by 2 to get y alone
2y/2 = 8/2
y = 4
Chat with our AI personalities
7+2y=15subtract 7 from each side of the equal sign2y=8divide each side by 2y=4
3x + 2y = 7
x+2y = 7 2y = -x+7 y = -0.5x+3.5
If: 3x+2y = 5x+2y = 7 which is the same as 7 = 7 = 7 Then: 3x+2y = 7 and 5x+2y = 7 Subtracting equations: x = 0 Therefore by substitution: x = 0 and y = 3.5
3x-2y-7=0