kmflexkm
kmflexkm
12-06-2017
Mathematics
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3x + 1 + 5x = 7 +15 + 7x
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Аноним
Аноним
12-06-2017
3x + 1 + 5x = 7 +15 + 7x
Move unknown terms to the left of the equal with changed sign and the known terms to the right of the equal with changed sign.
3x + 5x - 7x = 7 + 15 - 1
x = 21
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irspow
irspow
12-06-2017
Combine like terms on each side of the equation...
8x+1=7x+22 subtract 1 from both sides
8x=7x+21 subtract 7x from both sides
x=21
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