In 3x = 96 - 75 the "x" stands for the number which, when multiplied by 3, equals the difference between 96 and 75. 96 - 75 = 21 If 3x = 21 then x = 21 divided by 3, or 7
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3x+4=10 To solve: 3x+4=10 3x=6 x=2
3x+12 = 18 3x = 18-12 3x = 6 x = 2
3x - 6 = 15 3x - 6 + 6 = 15 + 6 (NOTE: In an equation with =, you can do ANYTHING you want to the problem as long as you do the exact same thing to both sides.) 3x = 21 x = 7
It is a simultaneous equation and its solution is x = -1 and y = -5
3x - 12 = 10x - 15 - 6x -10 3x - 12 = 4x -25 3x + 13 = 4x 13 = 4x - 3x 13 = x None?