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x = -1
-4 × -1 + 7 = 4 +7 = 11
x = 0
-4 × 0 + 7 = 7
x =2,5
-4 × 2,5 + 7 = - 10 +7 = -3
B) -3m-4n+3n+5m = -2m - n
m =1 i n=-2
- 2 - 2 = -4
m=-0,5 i n=0,1
-2 × (-0,5) - 0,1 = 1 - 0,1 = 0,9
C) -13x+y+23x-23x-20y+6 = -13x - 19y + 6
-4∧(-1)+7=4+7=11dla -1
-4∧0+7=0+7=7
-4∧2,5+7=-3
b)2m+n-rezultat
2+1+2=5
2+0,5+0,1=2,6
c)-13x-19y+6-rezultat
-13∧0,02-19∧(-₁₉³)+6=-0,26-130321+6=-130314,74
-13∧0-19∧1+6=0-19+6=-13
Ale nie jestem pewna czy te zadania są dobrze.