Question

afla termenul necunoscut a+9*2=35 a+10*2=50 5*2-a=6 8*2-a=9 a-7*2=39 a-6*2=59

Answer 1

a + 9 x 2 = 35
a + 18 = 35
a = 35 - 18
a = 17

a + 10 x 2 = 50
a + 20 = 50
a = 50 - 20
a = 30

5 x 2 - a = 6
10 - a = 6
a = 10 - 6
a = 4

8 x 2 - a = 9
16 - a = 9
a = 16 - 9
a = 7

a - 7 x2 = 39
a - 14 = 39
a = 39 +14
a = 53

a - 6 x 2 = 59
a - 12 = 59
a = 59 +12
a = 71.

Answer 2

a+9x2=35
a+18=35
a=35-18
a=17

a+10x2=50
a+20=50
a=50-20
a=30

5x2-a=6
10-a=6
a=10-6
a=4

8x2-a=9
16-a=9
a=16-9
a=7

a-7x2=39
a-14=39
a=39+14
a=53

a-6x2=59
a-12=59
a=59+12
a=71