3x+12 = 18 3x = 18-12 3x = 6 x = 2
x = 3y - 3 so 6 (3y - 3) + 2y = -12 ie 18y - 18 + 2y = -12 ie 20y = 6 so y = 0.3 and x = -2.1
x2+8x+12 = 0 When factorized: (x+6)(x+2) = 0 Therefore: x = -6 or x = -2
2x + 4 = 16 2x = 16 - 4 2x = 12 x = 12/2 x = 6
T = 3x + 7y; x = 4; y = 6T = 3x + 7y (substitute 4 for x, and 6 for y)T = 3(4) + 7(6) = 12 + 42 = 54
6 +6 = 12
X equals 6 ..
x = 6
6-x+12 = 10x+7 6+12-7 = 10x+x 11 = 11x x = 1
6-x=15
-18
x=12 because 12 over 6 is 2,and 2 plus 4 is 6.
12 equals 3x(4) equals 6x(2) equals (12)x1
6 + 2x = x - 6 6 + x = -6 x = -12
x=y-8 z=x+12
-6 = x + 6 Solve for x -6 - 6 = x x = -12
(x + 12)(x - 6) = 0 x = 6 or -12