Question

Add the two equations, 0.75x+1.5y=40 and −1.5x−1.5y=−60 , to find the value of x .

Answer 1

The value of x in the equation is 26.7

How to solve an equation?

0.75x + 1.5y = 40

−1.5x − 1.5y = −60

add both equation to eliminate y .

Therefore,

−1.5x + 0.75x = -0.75x

1.5y + (- 1.5y) = 0

40 + (-60) = -20

Hence,

-0.75x  = - 20

divide both sides by -0.75

-0.75x / -0/75 = - 20 / -0.75

x = - 20 / -0.75

x = 26.6666666667

x = 26.7

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