Question

cine ma ajuta ,75-{6×[3+(a+3)÷2-7]-3}×5=30​

Answer 1

Răspuns:

Explicație pas cu pas:

{6×[3+(a+3)÷2-7]-3}×5=75-30    {6[3+(a+3)/2-7}-3}×5=45

6[3+(a+3)/2-7}-3=9   6[3+(a+3)/2-7}=12    3+(a+3)/2-7=2

(a+3)/2=2+7-3    a+3=2×6     a=12-3      a=9