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(3x+4) / 2 = (5-3x) / 4 kedua ruas kalikan dg 4
2(3x+4) = (5-3x)
6x + 8 = 5 - 3x
6x + 3x = 5 - 8
9x = -3
x = -3/9
x = -1/3
no 2)
3x + 5y = 11 dan 47 - y = 7
kerjakan 47 - y = 7 terlebih dahulu
47 - y = 7
47 - 7 = y
40 = y
subsitusikan pada 3x + 5y = 11
3x + 5(40) = 11
3x + 200 = 11
3x = 11 - 200
3x = - 189
x = -189/3
x = -63
no 3)
6x^2 - 5x = 0
x(6x-5) = 0
x = 0 atau 6x-5 = 0
6x = 5
x = 5/6
jd x1 = 0 dan x2 = 5/6
no 4)
(x+3)(x-5) = x^2 - 5x + 3x - 15
= x^2 - 2x - 15
no 5)
(x - V3)(x - 2V3) = x^2 - 2V3 x - V3 x + 6
= x^2 - (3V3)x + 6
tanda V = akar