1) |w+2|=4
w= 4-2
w = 2
checking:
|2+2|=4
|4|=4
2) |3*x|=15
x = 15/3
x = 5
checking:
|3*5|=15
|15|=15
3) |y/7|=7
y = 7*7
y = 49
checking:
|49/7|=7
|7|=7
4) |z-6|=1
z= 1+6
z = 7
checking:
|7-1|=6|
|6|=6
5) |m-3|=1
m = m=1+3
x = 4
checking:
|4-1|=3
|3|=3
6) |5-y|=5
y = 5+5
x = 10
checking:
|5-10|=15
|-5|=5
7) |y/9|=8
y = 8*9
y = 72
checking:
|72/9|=8
|8|=8
8) |f*10|=100
f= 100/10
z = 10
checking:
|10*10|=100
|100|=100
9) |-20*u|=100
u =100\20
x = 5
checking:
|-20*5|=-100
|-100|=-100
=no solution
10) |9-d|=7
d = 7+9
x = 16
checking:
|9-16|=7
|-7|=7
11) |q+3|=1
q = 1-3
q = -2
checking:
|-2+3|=1
|1|=1
12) |h/5|=15
h= 15*5
h = 75
checking:
|75/5|=15
|15|=15
13) |55+n|=7
n =7-55
x = -48
checking:
|55-48|=7
|7|=7
14) |77/g|=7
g = 11*77
g = 11
checking:
|77\11|=7
|7|=7
15) |o-0|=9
0 = 9+0
q = 9
checking:
|9+0|=9
|9|=9