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Răspuns:
a)2456-x=1237
x=2456-1237
x=1219
b)x-2359=17206
x=17206+2359
x=19565
c)7378+x=12002
x=12002-7378
x=4624
d)x+125=2003
x=2003-125
x=1878
e)x-230-157=3156
x=3156+157+230
x=3543
f)4750+x-800=6700
x=6700+800
x=7500
4750+x=7500
x=7500-4750
x=2750