I would help you but there isn’t any questions or picture of the problem you need help with ????
Answer:
Step-by-step explanation:
These are simultaneous equations. The coefficients of <em>y</em> in both equations are the same, other than the difference in signs. We can thus eliminate <em>y</em> by adding both equations (if they had the same sign, we would have needed to subtract one equation from the other).
Substitute for <em>x</em> in any of the equations. We are using the first one here.
X+40=3x
40=3x-1x
40=2x
40/2=x
20=x
The answer is x = 12.
Cross multiply:
3(x + 2) = 7(x - 6)
3x + 6 = 7x - 42
Switch sides:
3x - 7x = -6 - 42
-4x = -48
x = -48/-4
x = 12
Answer:
82% decrease
Step-by-step explanation:
[(900 - 5000)/5000] 100
(-41/50) 100
= - 82%
( ' - ' indicates decrease)