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Află necunoscuta : (a+24)÷2=80 ; a+39-140=150 ; 125+a-176=180 ; n+481-356=547 ; 824-356+a=912

Răspuns :

Răspuns:

a+24=80x2

a+24=160

a=160-24=136

a+39=150+140

a+39=290

a=290-39=251

125+a=180+176

125+a=356

a=356-125=231

n+481=547+356

n+481=903

n=903-481=422

468+a=912

a=912-468

a=444

Explicație pas cu pas:

Răspuns:

(a+24)÷2=80

a+24=80*2

a+24=160

a=160-24

a=136

a+39-140=150

a+39=150+140

a+39=290

a=290-39

a=251

125+a-176=180

125+a=180+176

125+a=366

a=366-125

a=241

n+481-356=547

n+481=547+356

n+481=903

n=903-481

n=422

824-356+a=912

568+a=912

a=912-568

a= 344