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Q: If 5 plus 10 equals 15 and 3x equals 15 what is x?

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x+5 = 3x+15 x-3x = 15-5 -2x = 10 x = -5

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3x+5= 4x-10+10 +103x+15= 4x-3x -3x15=X

3x + 5 = 4x - 10Add 10 to each side:3x + 15 = 4xSubtract 3x from each side:15 = x

(2, -1)

10 -3x+8x = 25 -3x+8x = 25-10 5x = 15 x = 3

x=10

10 - 3x = x - 2x + 40 10 - 3x = - x + 40 10 - 40 = 3x - x -30 = 2x -15 = x

3x+12x = 15 15x = 15 x = 1

3x + 2 = -10 3x = -12 x = -4

3x+5 = 4x-10 In algebra, what you do to one side you do the other Now you add 10 to both sides 3x+5 + 10 = 4x-10+10 3x +15 = 4x now subtract 3x from both sides 3x-3x +15 = 4x-3x 15 = x

3x - 5 = -15 so 3x = -15+5 so 3x = 10 x = 10 over 3

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