Question

6. Calculează şi află valoarea lui x din exerciţiile de mai jos:
a) (x + 2 541) -6915 = 1 909
; c) (x-5438) + 5 980 = 9654;
b) 5 280 - (8 209 - x) = 2774
d) (3 159 + x) - 8 154 = 1069.
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Answer 1

Răspuns:

a) ( x+ 2.541) - 6.915=1.909

( x+2.541)=1.909+6.951

x+2.541=8.8.824

x=8.824--2541

×=6.283

V: (6.283- 2.541) -6.915=1.909

b) 5.280- (8209-x)=2774

(8209-x)=5280-2774

8.209-x= 2.506

x = 8.209- 2.506

x =5703

V: 5280-(8209-5703)=2774

c) ( x- 5.438)+5.980=9.654

(x-5.438)=9.654-5980

x-5.438=3.674

x=3.674+5.438

x= 9.112

V: (9.112- 5.438)+5.980=9.654

d) (3.159+x) -8.154=1.069

( 3.159+x) =1.069+8.154

3.159+x= 9.223

x = 9.223 - 3.159

x= 6.064

V : (3.159 + 6.064) - 8.154 =1.069