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kikirogers2255
16.03.2020 •
Mathematics
Solve each pair of equations by substituting
2x + y = 3
4x + 3y = 1
Solved
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Ответ:
the value of x and y is 4 and -5 respectively.
Step-by-step explanation:
from the equation we say let;
2x + y = 3 equation 1
4x + 3y = 1 equation 2
from equation 1
2x + y = 3 equation 1
y = 3 - 2x equation 3
Substitute for y in equation 2
4x + 3y = 1 equation 2
we have,
4x + 3(3- 2x) = 1
4x + 9 -6x = 1
we have to collect the like terms
9-1 = 6x -4x
8 = 2x
divide both sides by 2
8/2 = 2x/2
4 = x
therefore x = 4
put x = 4 in equation 3
y = 3 - 2x equation 3
y = 3 - 2(4)
y = 3 -8
y = -5
therefore the value of x and y is 4 and -5 respectively.
to check if your answer is correct, put the value of x and y in any of the equations.
2x + y = 3 equation 1
2(4) + (-5) = 3
8 -5 = 3
3 = 3 proved
Ответ:
I think is b
Step-by-step explanation: