Solving by Combining Like Terms
2(x + 5) + 7 = 21
x = 2
-31 - 4x = -5 - 5(1 + 5x)
1
5(d - 2) - 10 = 30
d = 10
3n - 9 = 42 - 12n
7
7(4 - t) - 14 = -98
t = 16
-16 - 2x = 2(x - 4x)
-2(x - 9) + 4x= 4(x - 6)
x = 21
-13(4 + 2a) - 2a = 2(104 + a)
a = -10
14(5a - 4) - 2 = 28 - 16a
1