Question

Determinați numărul natural x, care verifică următoarele egalități:
a) x-67-92=267;
b)542+x-117=638;
c) (43+x)+(537-214)=975.

Answer 1

a)x-159=267
x=267+159
x=426

b)x+425=638
x=638-425
x=213

c)43+x+323=975
x+366=975
x=975-366
x=609

Answer 2

$x-67-92=267$

x-159=267
x=267+159
x=426

$542+x-117=638$

542+x=638+117
542+x=755
x=755-542
x=213

$(43+x)+(537-214)=975$

(43+x)+323=975
43+x=975-323
43+x=652
x=652-43
x=609