x + 3 – 2 = 7
x + 1 = 7
x + 1 + –1 = 7 + -1 / –1
x + 0 = 6
x = 6
3 • x = 81
3 • x = 81 / :3
3 • x : 3 = 81 : 3
3 : 3 • x = 27
1 • x = 27
x = 27
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