X = 12
First, subtract 3x from each side of the equation. Then, divide each side of the equation by 7 .
5x+y=-7 3x+y=15 8=D
15x minus 8=minus 180 3x+8=24
From second equation: y = 8 + 2xSubstitute for y in first equation: 3x + 16 + 4x = 2ie 7x = -14ie x = -2 and y = 4
x = 6
X = 12
3x + 2y = 12 ie 2y = 12 - 3x so y = 6 - 3x/2
First, subtract 3x from each side of the equation. Then, divide each side of the equation by 7 .
You cannot solve one linear equation in two unknown variables.
5x+y=-7 3x+y=15 8=D
3x-2 = 2x+3 3x-2x = 3+2 x = 5
3x+4=10 To solve: 3x+4=10 3x=6 x=2
15x minus 8=minus 180 3x+8=24
From second equation: y = 8 + 2xSubstitute for y in first equation: 3x + 16 + 4x = 2ie 7x = -14ie x = -2 and y = 4
From first equation: y = 5 - 5xSubstitute for y in second equation: 3x + 10 - 10x = 3ie -7x = -7ie x = 1 and y = 0
2y-3x=4