2x + 4y = 14
4x + y = 20......multiply by -4
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2x + 4y = 14
-16x - 4y = -80 (result of multiplying by -4)
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-14x = -66....as u can see, ur y's cancel out
so ur answer is : 1st answer choice <==
** and just so u know, u could have multiplied the 1st equation by -2, and it would have cancelled out ur x's
Answer:
what image i dont see an image
Step-by-step explanation:
Answer:
21+3x
Step-by-step explanation:
Expand this:
3(7+x)
So it becomes:
21+3x
48 marks. Because 80/10 is 8. 8x6 =48
11.4 multiplied by 4 trucks = 45.6 tons in the trucks.
55 - 45.6 = what remains in the pile which would be 9.4 tons.