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determina necunoscuta"a" :a+200+300+400-600=450+350-400 ​

Răspuns :

a+200+300+400-600=450+350-400
a+900-600=800-400
a+900-600=400
a+900=400+600
a+900=1000
a=1000-900
a=100

Răspuns:

a+200+300+400-600=450+350-400

a+900-600=800-400

a+300=400

a=400-300

a=100

Explicație pas cu pas: