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zhannawk [14.2K]
3 years ago
6

Solve the given system, using the substitution method.

Mathematics
2 answers:
Aleksandr-060686 [28]3 years ago
5 0
Y = 3x - 7
6x - 2y = 12

6x - 2(3x-7) = 12
6x - 6x -7 = 12
-7 = 12

6x - 2y = 12
6x = 12 + 2y
x = 12/6 + 2y/6
x = 2 + y/3

y = 3x - 7
y = 3(2 + y/3) - 7
y = 6 + 3y/3 - 7
y = 6 + y - 7
y - y = 6-7
0 = -1

B.) THERE IS NO SOLUTION.
vichka [17]3 years ago
4 0
Subsitution
ok so
y=3x-7
subsitute 3x-7 for y since they are equal
6x-2(3x-7)=12
distribute
6x-6x-7=12
add like terms
0x-7=12
-7=12
false
therefor there is no solution

B is teh answer
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