11x - 21 = 7x + 3 4x = 24
x = 6
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X2+11x+11 = 7x+9 X2+11x-7x+11-9 = 0 x2+4x+2 = 0 Solve as a quadratic equation by using the quadratic equation formula or by completing the square: x = -2 + or - the square root of 2
11x + 2 = 26 + 7x Subtract 7x from both sides: 4x + 2 = 26 Subtract 2 from both sides: 4x = 24 Divide both sides by 4: x = 6
7x + 5y 7(3) + 5(2) 21 + 10 = 31
4y + 3w + 4x + 9y + 7x - 7w (combine like terms)-4w + 11x + 13y
If the equation is 7x - 3y = 21 then (3, 0) and (0, -7).