Rozwiąż rownanie :
x+50+40=2(x+40)
x+50+40=2x +80
x-2x=-50-40+80
-x=-90+80
-x= -10|;1
x=-10
x+50=40=2x+80
x-2x=80-50-40
-x=-10 /(-1)
x=10
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x+50+40=2(x+40)
x+50+40=2x +80
x-2x=-50-40+80
-x=-90+80
-x= -10|;1
x=-10
x+50=40=2x+80
x-2x=80-50-40
-x=-10 /(-1)
x=10