3x * (x - 4) = 3x*x - 3x*4 = 3x^2 - 12x.
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3x=(33+42) 3x=75 x=75/3 x=25
(42/3x)*12=24 42/3X=2 42=6X x=7 if it'isn't 3x but x^3 then 21=X^3 21^(1/3)=2.76
3x + 3x + 3x = 3* (3x) = 9x
y=-2/3x with any y-intercept except -2.
7x + 3y = 42 can be converted to slope intercept form using the formula y = mx + b. First, get 3y on to the outside. -3y = 7x - 42 Divide everything by -3. You are left with y = 7/3x + 14