Question

afla termenul necunoscut:
a×(51-45)=36
a×2-4=6
4×a+25=45
32+a-2=6
70-70÷a=60

Answer 1

A×6=36 a×2=6 4×a=45-25 a=5 A=36÷6 a=6÷2 4×a=20 A=6 a=4 a=20÷4 a-2=32-6 70:a=70-60 a=26+2 a=70:10 a=28 a=7

Answer 2

ax(51-45)=36, ax6=36, a=36:6, a=6

ax2-4=6, 2xa=6+4, 2xa=10, a=10:2, a=5

4xa+25=45, 4xa=45-25, 4xa=20, a=20:4, a=5

32+a-2=6, 30-a=6, a =30-6, a=24

70-70:a=60, 70:a=70-60, 70:a=10, a=70:10, a=7