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Litzy Lester
Mathematics
8 June, 23:45
4x - 3y = 15
2x + 2y = 4
what is the solution of the system of equations?
+5
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1
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Emely Ibarra
9 June, 00:09
0
System of Linear Equations entered:
[1] 4x - 3y = 15
[2] 2x + 2y = 4
Step-by-step explanation:
/ / Solve equation [2] for the variable y
[2] 2y = - 2x + 4
[2] y = - x + 2
/ / Plug this in for variable y in equation [1]
[1] 4x - 3• (-x + 2) = 15
[1] 7x = 21
/ / Solve equation [1] for the variable x
[1] 7x = 21
[1] x = 3
/ / By now we know this much:
x = 3
y = - x+2
/ / Use the x value to solve for y
y = - (3) + 2 = - 1
Solution:
{x, y} = {3,-1}
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