Question

!!15 puncte!!Afla numarul necunoscut din 3 supra 4 + x = 7 supra 4
5 supra 5 + x = 7 supra 5
x + 3 supra 10 = 10 supra 10
6 supra 8 + x = 10 supra 8

Answer 1

3/4+x=7/4
x=7/4-3/4
x=4/4
x=1

5/5+x=7/5
x=7/5-5/5
x=2/5

x+3/10=10/10
x=10/10-3/10
x=7/10

6/8+x=10/8
x=10/8-6/8
x=4/8
x=1/4

Answer 2

3\4+X=7\4 
X=7\4-3\4==>  X=4\4==> X=1

5\5+X=7\5
X=7\5-5\5==> X=2\5=>X=0,4

X+3\10=10\10
X=10\10-3\10==> X=7\10 ==>X=0,7

6\8+X=10\8
X=10\8-6\8==> X=4\8==>X=0,5