1) (8y-12)(2,1+0,3y) = 0
8y-12 = 0; 2.1+0.3y = 0
8y = 12; 0.3y = -2.1
y = 1.5; y = -7
2) 7x-(4x+3) = 3x+2
7x-4x-3 = 3x+2
7x-4x-3x = 2+3
0 ≠ 5
1) (8y-12)(2,1+0,3y) = 0
8y-12 = 0; 2.1+0.3y = 0
8y = 12; 0.3y = -2.1
y = 1.5; y = -7
2) 7x-(4x+3) = 3x+2
7x-4x-3 = 3x+2
7x-4x-3x = 2+3
0 ≠ 5