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Mathematics
Sarahi Atkinson
25 February, 09:18
Solve by using Substitution:
x=2-3y
5x-7y=4
+4
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2
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Carl Ware
25 February, 10:26
0
Plug in 2-3y into the x so it would be 5 (2-3y) - 7y=4. Then you distribute, so it would be 10-15y-7y=4. Next combine like terms, so it would be 10-22y=4. Subtract 10 to both sides which then makes it 22y=-6. Divide 22 to both sides. y = 3/11. Plug 3/11 into the equation x=2-3y so it turns into x=2-3 (3/11). Then x = - 7
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Colt Chapman
25 February, 11:25
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X = 2 - 3y - - > substitute it into the second equation
5 (2 - 3y) - 7y = 4 - - > solve
10 - 15y - 7y = 4
-22y = 4 - 10
y = - 6/-22 = 3/11
To solve for x, plug y back into the first equation:
x = 2 - 3 (3/11)
= 2 - 9/11
= 13/11
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