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Mathematics
Charlie Chase
27 March, 10:44
Value of X?
7x+3x=90?
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Carleigh Hancock
27 March, 11:41
0
10x=90
X=9
To check
7 (9) + 3 (9)
63+27
=90
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Pace
27 March, 12:53
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7x+3x=90
7x+x=90-3
7x+x=87
X^2=87-7
X^2=80
(Take the square root of both X^2 and 80)
*answer = 8.94 (round off to whole number = 9)
(Proof check yourself)
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