Mathematics
02.08.2021 11:34
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Solve the system of equation by elimination. 27= -3y + x 2 y=10 - 4x
Solve the system of equation by elimination.
27= -3y + x
2 y=10 - 4x
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27= -3y + x
2 y=10 - 4x
Meliiiii
4,8(73 marks)
x=6 y=-7
Step-by-step explanation:
rearrange the equation
3y=x-27 eq 1
2y=-4x+10 eq 2
Multiply eq 1 by 2, and eq 2 by 3
6y=2x-54
6y=-12x+30 subtract the two eq's
0=14x-84
84=14x
x=84÷14
x=6
solving for y sub. x either eq 1 or 2
3y=x-27
3y=6-27
3y=-21
y=-21÷3
y=-7
hipeopleitsme121
4,7(11 marks)
6 pound - first one
14 - second one
$172.20 - third one
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