3x+7=4x 7=4x-3x 7=x
4x - 7 = -15 4x = -8 x = -2
7-3x = -4x + 13x = 6
3x+7=4x-73x=(-)7+4x-4x(-)1x=(-)7________(-)1x=7add (-3x) to each side of equation3x +7 = 4x-3x +3x +7 = 4x -3x0 +7= 1x7=x
(A): 4x + y = 7 (B): 2x - 3y = -7 2*(B) 4x - 6y = -14 Subtract from (A) 7y = 21 Divide both sides by 7: y = 3 Substitute in (A): 4x + 3 = 7 ie 4x = 4 or x = 1 Answer: x = 1 , y = 3
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If: 5x = 4x+7 Then: 5x-4x = 7 And: x = 7
3x+7=4x 7=4x-3x 7=x
3x = 7 - 4x 3x + 4x = 7 - 4x + 4x 7x = 7 7x/7 = 7/7 x = 1
4x-5=7 4x=12 x=3
y= -4x-7 y=3x 3x= -4x-7 3x+4x=7 7x=7 x=1
3x = 7-4x 3x+4x = 7 7x = 7 x = 1
x = 37 4x - 7 = 141 4x - 7 + 7 = 141 + 7 4x = 148 x = 37
4x-7=5x-2 x=-5
4x - 7 = -15 4x = -8 x = -2
4x+7-8x=17-4x+7=17-4x=10x = -5/2