7x=2x-4
5x=-4
x=-4/5
7x + y = 4y = 4 - 7x
7x + 2 = 5,6
Subtract by 7x and divide by 2.
40 -7x = -16 -7x = -16 -40 -7x = -56 x = 8
7x-3=39 7x=42 x=6
7x=42 x=42/7 or, x=6
7x + y = 8 Subtract 7x from each side of the equation: y = -7x + 8
7x+2-2=16-27x = 147x/7 = 14/7x = 2
24
7x = 3x - 12 4x=-12 x=-3
You cannot solve one linear equation with two unknown variables.
7x = 35 (divide by 7 on both sides to get x by itself)x = 5