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mel-nik [20]
3 years ago
9

4(2x+5) = 3(x+15) Using substitution... how?

Mathematics
2 answers:
Gala2k [10]3 years ago
8 0
8x+20=3x+45
5x+20=45
5x=25
x=5
Tema [17]3 years ago
5 0
Ok so i will show step by step
3(2x+5)=3(x+15) this is the equation 
6x+15=3x+45 distributive the 3 on the outsides of the ()
6x=3x+30 subtract the 15 from both sides
3x=30 now you subtract 3x from both sides
x=10 you will divide 3 from both sides to find x by its self
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