19
59
138
28
6z+28=12z+10 6z-12z=10-28 addition property of equality. -6z=-18 simplification z=3 multiplication property of equality.
28 + 19 = 47
2a + 9 = 4a - 19 9 + 19 = 4a - 2a 28 = 2a a = 14
22+22+28+28=100.
it equals 28
it is 28
3x + 7 = -4x + 28 implies 7x + 7 = 28
-28 + (-19) = -47