Question

1) 4x-3y-2x+(-6); 2) 5(3x-2)-6; 3) 18a+(a-4)-(15a+3)​

Answer 1

$4x - 3y - 2x + ( - 6) = 4x - 3y - 2x - 6 = 4x - 2x - 3y - 6 = 2x - 3y - 6$

$5(3x - 2) - 6 = 5 \times 3x - 5 \times 2 - 6 = 15x - 10 - 6 = 15x - (10 + 6) = 15x - 16$

$18a + (a - 4) - (15a + 3) = 18a + a - 4 - 15a - 3 = 18a - 15a - 4 - 3 = 3a - (4 + 3) = 3a - 7$