add the two equations, 0.75x+1.5y=40 and −1.5x−1.5y=−60, to find the value of x.
Adding both equations together gives -0.75x = -20
Dividing both sides by -0.75 will give x = 26.6666 .. repeating or 26 and 2/3
0.75x+1.5y=40
−1.5x−1.5y=−60
0.75x = – 20
x = 26.666 o r 26.67 answer//
0.75x = – 20
0.75x + 1.5y = 40 ……….(1)
-1.5x – 1.5y = -60 …………(2)
Solving equation (1) and (2)
0.75x + 1.5y = 40
-1.5x – 1.5y = -60
-0.75x = -20
x = 20/0.75
0.75 (20/0.75) + 1.5y = 40
20 + 1.5y = 40
1.5y = 20
y = 20/1.5
If we add these two equations, the y variables will zero each other out, leaving
-0.75x = -20
Simply divide both sides by -0.75 to find your answer.
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