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a fost răspuns

Afla validarea lui ,, a", apoi verifica:7*a-15÷3+9=60| 16+72÷b*10-32=74

Răspuns :

7xa-15:3+9=60
7xa-5=60-9
7xa-5=51
7xa=51+5
7xa=56
a=56:7
a=8

Verificare:7x8-15:3+9=
56-5+9=51+9=60

16+72:bx10-32=74
72:bx10=74+32-16
72:bx10=90
72:b=90:10
72:b=9
b=72;9
b=8
verificare:16+72:8x10-32=
16+9x10-32=
16+90-32=
106-32=74

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