Without an equality sign the terms given can't be considered to be an equation.
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The equation 6 x-1 18x can be simplified to the answer 112x.
The 'answer' is the number that 'x' has to be in order to make the statement true.18x + 3 = 12xSubtract 3 from each side of the equation:18x = 12x - 3Subtract 12x from each side:6x = -3Divide each side by 6 :x = - 1/2
x^3-10x²+18x+24=0 Factor the equation so we can have equations which are easier to find 0's for. (x-4)*(x²-6x-6)=0 Set each component equal to 0 and solve for x. x-4=0 x=4 x²-6x-6=0 x=(-b±√(b²-4ac))/2a x=(-6±√(36-24))/2 x=-3±√3
To solve a system of equations using substitution you solve one of the equations for one of the variables then substitute that into the other equation to solve for the other variable. For example. y = 6x 2x + 3y = -20 The first equation has already been solved for y. So, you simply substitute that into the second equation. 2x + 3(6x) = -20 2x + 18x = -20 20x = -20 x = -20/20 = -1 Now you have solved for x. You can substitute your answer for x back into the first equation to solve for y. y = 6x = 6(-1) = -6 Putting it all together... x = -1 y = -6
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