Rozwiąż zadania. Choćby 2, to dam naj
2. x+y = 140 -----> x+3/4x = 140/*4 || 7x = 560/:7 || x = 80 || y=60 7/8x = y+1/8xy=3/4x
1. na koniec równania napisz /*129x-12x-48<8x-16-2x-2-3x-8x+2x<48-18-9x<30 /:(-9)
x>-3i1/3
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2. x+y = 140 -----> x+3/4x = 140/*4 || 7x = 560/:7 || x = 80 || y=60
7/8x = y+1/8x
y=3/4x
1. na koniec równania napisz /*12
9x-12x-48<8x-16-2x-2
-3x-8x+2x<48-18
-9x<30 /:(-9)
x>-3i1/3