Asked by pam
solve the system of equations by elimination.
3x-4y=22
2x+5y=7
3x-4y=22
2x+5y=7
Answers
Answered by
helper
3x - 4y = 22
2x + 5y = 7
To eliminate variable x,
Multiply by -2 (3x - 4y = 22)
Multiply by 3 (2x + 5y = 7)
Add equations
-6x + 8y = -44
6x + 15y = 21
0 + 23y = -23
23y = -23
y = -1
To find x,
substitute y = -1, in 2x + 5y = 7
2x + 5y = 7
2x - 5 = 7
2x = 12
x = 6
x = 6, y = -1
2x + 5y = 7
To eliminate variable x,
Multiply by -2 (3x - 4y = 22)
Multiply by 3 (2x + 5y = 7)
Add equations
-6x + 8y = -44
6x + 15y = 21
0 + 23y = -23
23y = -23
y = -1
To find x,
substitute y = -1, in 2x + 5y = 7
2x + 5y = 7
2x - 5 = 7
2x = 12
x = 6
x = 6, y = -1
Answered by
donneisha
x=6
Answered by
rose
3x+4y=-22
Answered by
Jallah
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