The answer to the question is B
4x+8y=20
-4x+8y=30
——————-
-4 and 4 cancel each other
16y=50
y= 25/8
4x+8y=20
4x+8(25/8)=20
4x+25=20
-25 -25
4x=-5
x= -5/4
(25/8 , -5/4)
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We see that y is equal to 3/2x-2. We can replace the y in the first equation with 3/2x-2 because they are equal and we can solve for x.
3x-2(3/2x-2)=-8
We use the distributive property to undo the parentheses.
3x-3x+4=-8
We combine like terms.
4=-8
We see that since there is no x anymore, there cannot be a solution. We have no x value to solve for the y value either, so there is no solution to this system of equations.
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Answer:
<em>1. 21, 22</em>
<em>2.29,30</em>
Step-by-step explanation:
1. m+4>24
subtract both sides by 4
m>20
Two values that are greater than 20 are 21 and 22.
2. 7<x/4
multiply both sides by 4
28<x
Two values that are greater than 28 are 29 and 30.