zad7 i 10 117 i 118
zad7
d) 2x + y = 9
5x - 4y = 3
e) 3x - 2y +5
2x -y +4
zad10
a) y+ 2- (3-x) = 0
x - 2 = 5 - (2 - y)
b) 3(x -y)+ 4x + 8
3(x - 5y) = 5 -9y
c) 3(2x - 1) +4(y-2) =9
2(5x -1) +3y +5(3x +y) + 2
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zadanie wyślę w załączniku.