-18+x = 3
x = 3+18
x = 21
you mean: x+3x+3=x+18 so x=5
If you mean -x +x/3 = 12 then the value of x is -18 Check: --18 +(-18/3) = 12
6x³ +12x + 18 = 6(x + 1)(x² - x + 3)
5x squared plus 33x plus 18 = (5x + 3)(x + 6) x = -6, -3/5
-12
X2 + 3X - 18 Ask yourself, what two factors of - 18 add to 3? (X + 6)(X - 3) -----------------
x^2-9x+18=(x-6)(x-3)
x2 + 3x - 18 = x2 + 6x - 3x - 18 = x(x + 6) - 3(x + 6) = (x + 6)(x - 3)
3(x + 2) = x - 18 3x + 6 = x - 18 3x - x = -18 - 6 2x = -24 x = -12
x2+9x+18 find factors of 18 that add up to 9, in this case 6&3 (x+6)(x+3)
If you mean -3(x+5) = 8x+18 then -3x-15 = 8x+18 and the value of x works out as -3
2 x 3 x 3 = 18