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Mathematics
Tanya
18 August, 14:53
Solve.
2x + 6 - 7x = 21
+2
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2
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Giada Acevedo
18 August, 15:47
0
-7x + 2x (add common factors)
-5x+6+21 (what happen to one side happens to the others
-5x=21 (divide by five)
x = - 3
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Matteo
18 August, 17:12
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Combine like terms, 2x + - 7x = - 5x.
Now you have - 5x + 6 = 21.
subtract 6 from both 6 and 21, the 6 cancels out and 21-6=15.
You’re left with - 5x=15
Divide 5 on both sides, - 5 cancels out, and you’re left with
x=-3
sorry this was messy and i hope this made sense!
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