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1/3(5x-15+4x)=1+3×+4

1 Answer

5 votes

Answer:

x=6

Explanation:

Using BODMAS Simplify the bracket first

5x+4x-15=9x-15

Cross multiply 9x-15/3 with 1+3×4

9x-15=3(1+3×4)

9x-15=3(1+12)

9x-15=3(13)

9x-15=39

adding 15 to both sides

9x=39+15

9x=54

x=6

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