Question

3 Aflaţi termenul necunoscut x:
a) x + 45 = 97; 121 = x + 89;
c) 136 - (x + 14) = 109;
-
b) 261 - x = 138; - 158 = 147;
d) 112 + (27 - x) = 261.

Answer 1

a) x+45=97
x=97-45
x=52

121=x+89
x=121-89
x=32

b)261-x=138
x=138-261
x=-123

c) 136-(x+14)=109
136-x-14=109
-x=109-136+14
-x=-13|-1
x=13

d) 112+(27-x)=261
112+27-x=261
-x=261-27-112
-x=122|-1
x=-122