Question

exercițiul 3 ma ajutați va rog la a,b,d dau coroana

Answer 1

a)x+7=9
x=9-7
x=2
b)x-3=7
x=7+3
x=10
d)x+2=7
x=7-2
x=5

Answer 2

a) x=9-7= 2;b) x=7+3= 10; c) x=5+8=13; d) x=7-2=5; e) x=31-14=17;f) x=21-12=9; g) x=-1-43=-44;h) x=-6-39=-45