Question

Va rooog ajutați-mă repede​

Answer 1

Răspuns:

a)a+b-3x=56

a+b=56+3×14=56+42=98

b)11×a+11×b+56+x=1170

11(a+b)=1170-56-14=1100

a+b=1100/11=100

c)7×a+7×b+7×X=700

7(a+b)=700-7×14=700-98=602

a+b=602/7=86

d)30×X-a-b=241

a+b=30×14-241=179

e)39×a+39×b-39×X=3900

39(a+b)=3900+39×14=3900+546=4446

a+b=4446/39=114

f)9×X-2a-2×b=100

2(a+b)=9×14-100=126-100=26

a+b=26/2=13

g)X×a+X×b=140

14(a+b)=140

a+b140/14=10

h)X×a+X×b+6×a+6×b=200

14(a+b)+6(a+b)=200

20(a+b)=200

a+b=200/20=10