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satela [25.4K]
4 years ago
8

3x+6+6x=42 what is x?

Mathematics
2 answers:
Flura [38]4 years ago
5 0

3x+6+6x=42

9x+6=42

9x+6-6=42-6

9x= 36

Divide by 9 for 9x and 36

9x/9=36/9

x=4

Check answer by using substitution method

3(4)+6+6(4)=42

12+6+24=42

42=42

Answer is x=4

tatiyna4 years ago
4 0

Answer:

x = 4

Step-by-step explanation:

Step 1: Combine like terms

9x + 6 = 42

Step 2: Isolate x by subtracting 6 on both sides

9x = 36

Step 3: Isolate x by dividing by 9 on both sides

x = 4

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