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mina [271]
3 years ago
15

a 9 grade math class has 27 students there are twice as many girls in this class as there are boys.write a system of equation th

at could be used to model this situation.solve system of equetion using any method how many girls are in the class
Mathematics
1 answer:
Leona [35]3 years ago
4 0
If there are x boys, there are 2x girls. boys+girls=27 gives x+2x=27. Solving, 3x=27 or x=9. Since there are 2x girls, there are 2*9=19 girls.
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Pachacha [2.7K]

The value of x in the equation is 4.2.

<h3>How to calculate the value?</h3>

It should be noted that the equation given is:

12(-11x + 5) + 7 = 2 (x-9) - 451

This will be computed thus:

12(-11x + 5) + 7 = 2 (x-9) - 451

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Collect like terms

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-130x = -546

Divide

x = 546/130

x = 4.2

The value of x in the equation is 4.2.

Learn more about equations on:

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