Tìm x biết:
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Bài 5: Tìm x biết:
1) 39 + 7.(x + 1) = 60
4) 7 + 2.(x - 3) = 11
7) 21 - 5.(x - 4) = 11
10) 96 - 3.(x - 1) = 42
13) 100 - 7.(x - 5) = 58
16) 123 - 5.(x + 4) = 38
2) 17 + 3.(x + 6) = 47
5) 5 + 2.(x + 4) = 65
8) 21 - 3.(x - 2) = 18
11) 70 - 5.(x - 3) = 45
12) 215 - 3.(x + 8) = 140
15) 123 - 3.(x - 2) = 78
3) 19 + 4.(3 + x) = 51
6) 12 + 2.(x + 6) = 72
9) 60 - 3.(x - 2) = 51
14) 128 - 3.(x + 4) = 23
17) 147 - 7.(x - 13) = 98
18) 125 - 12.(x - 17) = 89
Bài 5: Tìm x biết:
1) 39 + 7.(x + 1) = 60
4) 7 + 2.(x - 3) = 11
7) 21 - 5.(x - 4) = 11
10) 96 - 3.(x - 1) = 42
13) 100 - 7.(x - 5) = 58
16) 123 - 5.(x + 4) = 38
2) 17 + 3.(x + 6) = 47
5) 5 + 2.(x + 4) = 65
8) 21 - 3.(x - 2) = 18
11) 70 - 5.(x - 3) = 45
12) 215 - 3.(x + 8) = 140
15) 123 - 3.(x - 2) = 78
3) 19 + 4.(3 + x) = 51
6) 12 + 2.(x + 6) = 72
9) 60 - 3.(x - 2) = 51
14) 128 - 3.(x + 4) = 23
17) 147 - 7.(x - 13) = 98
18) 125 - 12.(x - 17) = 89