1) y + 74 =172
y = 172 - 74
y = 98
2) 2x + 18 = 66
2x = 66 - 18
2x = 48
x = 24
3)86 + 35z = 331
35z = 331 - 86
35z = 245
z =7
4) 2m - 45 = 127
2m = 127 + 45
2m = 172
m = 86
5) 120 + 3p - 97 = 233
3p = 233 - 120 + 97
3p = 210
p = 70
