<PRE><B>Question 1084436</B>
Determinant(D) = 7*4 - 3*3 = 19
:
D(x) = 1 * 4 - 3 * 5 = -11
:
D(y) = 7 * 5 - 1 * 3 = 32
:
x = D(x) / D = -11/19
:
y = D(y) / D = 32/19
:
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x = -11/19, y = 32/19
:
check our solution
:
7 * (-11/19) + 3 * (32/19) = 1
(-77/19) + (96/19) = 1
19/19 = 1
1 = 1
:
3 * (-11/19) + 4 * (32/19) = 5
(-33/19) + (128/19) = 5
95/19 = 5
5 = 5
:
our solution checks
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