Answer:
A.
Transfer -x to the left side, change its integer sign
y+x= 4
Arrange
x+y= 4
Transfer -2x to the right side, the integer sign will change
y+2x= 6
2x+y= 6
B.
Transfer 2x to the left side, change its integer sign
y= -2x+9
Transfer x to the left side, change the integer sign
2y= x+4
Cancel 2 from 2y by dividing to both sides
2y = x + 4
2 2 2
y= x + 2
2
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Verified answer
Answer:
A.
1. y= -2x+4
Transfer -x to the left side, change its integer sign
y+x= 4
Arrange
x+y= 4
2. y= -2x+6
Transfer -2x to the right side, the integer sign will change
y+2x= 6
Arrange
2x+y= 6
B.
1. 2x+y= 9
Transfer 2x to the left side, change its integer sign
y= -2x+9
2. x+2y= 4
Transfer x to the left side, change the integer sign
2y= x+4
Cancel 2 from 2y by dividing to both sides
2y = x + 4
2 2 2
y= x + 2
2
#CarryOnLearning