Question

Rezolvă ecuatiile : 75+25=y+40+52; 125-94=a+20+5; 728-600=353+421-640-b; c-72=53+150-200; 53-d=12929-50. Va rog ajutati-ma!

Answer 1

75+25=y+40+52
-y+100=92
-y=92-100
-y=-8
y=8
b)125-94=a+20+5
31=a+25
-a=25-31
-a=-6
a=6
c)728-600=353+421-640-b
128=774-640-b
128=134-b
b=134-128
b=6
d)c-72=53+150-200
c-72=3
c=3+72
c=75
e)53-d=12929-50
-d=12929-50-53
-d=12929-103
-d=12826
d=-12826