2x - 6 = 3x + 3: * Firstly, subtract 2x from both sides of the equation: -6 = x + 3 * swap the equation, so that "x" is on the left-hand side (to make things easier): x + 3 = -6 * subtract 3 from both sides of the equation, to give: x = -9
3
23
x=7
x = -8
x2 plus 3x plus 3 is equals to 0 can be solved by getting the roots.
-3x + 5 = 20 -3x = 15 x = -5
3x + 2y = 12 ie 2y = 12 - 3x so y = 6 - 3x/2
x = -8
x = 6
7x = 3x - 12 4x=-12 x=-3
x = 5, y = -1
3x + 4= 7 3x= 7-4 3x/3 = 3/3 x=1