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sweet-ann [11.9K]
3 years ago
8

Just number 7, please help quickly I don’t know what I’m doing (if you give an explanation I’ll mark as brainliest)

Mathematics
2 answers:
adell [148]3 years ago
4 0

Answer:

x=12

Step-by-step explanation:

x+5+3x+10=x+51

Step 1- Simplify

15+4x=x+51

Step 2- Move the variable to one side  

15+4x=x+51  

    -1x -1x

15+3x=51

Step 3- Subtract

15+3x=51

-15       -15

3x=36

Step 4- Divide

<u>3x</u>=<u>36</u>

3    3

Conclusion-- x=12

Bess [88]3 years ago
3 0

Answer: b

Step-by-step explanation:

x=12

12+5=17

3 times 12 is 36+10=46

46+17=63

12+51=63  

They are both 63

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