1) 34x + 66x
(34+66)x
100x
x = 8
100 × 8 = 800
2) 54a -39a
(54-39)a
15a
a = 26
15 × 26 = 390
3) 18m - 5m + 7m
(18-5+7)m
20m
m = 394
20 × 394 = 7880
4) 19z - 12z + 33z - 19z
(19-12+33-19)z
21z
z = 82
21 × 82 = 1722
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Answers & Comments
1) 34x + 66x
(34+66)x
100x
x = 8
100 × 8 = 800
2) 54a -39a
(54-39)a
15a
a = 26
15 × 26 = 390
3) 18m - 5m + 7m
(18-5+7)m
20m
m = 394
20 × 394 = 7880
4) 19z - 12z + 33z - 19z
(19-12+33-19)z
21z
z = 82
21 × 82 = 1722