Question

1. Calculeaza valoarea lui a din fiecare relatie.
DAU COROANA VA ROG!

Answer 1

a) (321×2-115×4)+24÷a=180+2×4

(642-460)+24÷a=180+2×4

102+24÷a=180+8

102+24÷a=188

(24÷a)=188-102

24÷a=186

a=24×186

a=4464

b) (20+25×2)+800÷a-7×10=8

(20+50)+800÷a-7×10=8

70+800÷a-7×10=8

870÷a-70=8

870÷a=70+8

870÷a=78

a=870×78

a=67870