1) 28 + 3x = 7x
x=7
2) 18+ 5x =8x
x=6
3) 42 — 5y = 2y
y=14
4) 3z + 18 = 5z
z=9
5) 5x + 18 = 3x + 38
x=-10
6) 2y + 45 = 6y + 17
y=7
7) 7z — 5 = 3z + 3
z=4
8) 14z + 23 = 19z — 2
z=-5
9) 5x + 3x — 10 = 14
x=-2
10) 8m + m + 4 = 49
m=6/3
11) 7a + 2a + 4 = 40
a=7/1
12) 15y — 9y — 2 = 10
x=2
13) — 3 — 5x + 20 + 2x = 5
x=-6
14) 9b — 3 — 5b + 13 = 22
b=16
15) 12 — 3x + 5 = 5x + 1
x=8
16) 21a — 11 = 4 + 6a
a=-1
17) 16x + 10 — 21x = 35 — 10x — 5
x=2/10
18) y + 13 — 2y = 100 — 20y — 18
y=-5/15
19) 7b — 9 — 8b = 23 — 15b — 18
20) 11a — 6 — 4a = 7a — 8 — 3a + 5
a=3
21) 27x + 36 — 18x — 39 — 6x — 24 = 0
x=-17
22) 10y + 9 — 7y — 7 = 7y — 9 — 8y + 7
y=-1/6
23) (3x + 8) + (2x — 5) = 13
x=10
24) (2y + 13) — (5y — 17) = 240
25) 8x — (2x — 9) = 4x — (8x + 11)6

































