1) -9(10x+3) 4x(7x+9)
-90x-27 28x² +36
2) -6r x r 4w-5w
-6 r² -1w
3) 4x+3 < 7x 4(x+3) > 7x 4x+3 ≥ 7x+8 4x+3 ≤ 7x+8
3 < 7x-4x 4x+12 > 7x 4x-7x ≥ 8-3 4x-7x ≤ 8-3
3 < 3x. 4x-7x > -12 -3x ≥ 5 -3x ≤ 5
3/3 < x -3x > -12 x ≤ 5÷-3 x ≥ 5÷-3
1 < x. x < 4
4(x+3) > 7(x+8) -4x+3 ≥ 7x-8
4x+12 > 7x+56 -4x-7x ≥ -8-3
4x-7x > 56-12 -11x ≥ -11
-3x > 44 x ≤ 1
x < 44/-3
