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jasenka [17]
3 years ago
12

Solve the following equation by COMBINING LIKE TERMS FIRST: 3x + 3 - x + 4 = 21

Mathematics
1 answer:
bonufazy [111]3 years ago
8 0
3x + 3 - x + 4 = 21

3x - x = 2x

2x +3 +4 = 21

3 + 4 = 7

2x + 7 = 21
      -7    -7

2x = 14
---    ----
2       2

x = 7
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