1) 42:6=14:(a-2)42/6 = 714/7 = 2a-2 = 2a = 4
2) (a+1):4=36:9(a+1)/4 = 36/9(a+1)/4 = 4(a+1) = 16a = 15
3) 400:(a-5)=120:6400/(a-5) = 120/6400/(a-5) = 20(a-5) = 20a = 25
4) 88:44=(a-6):288/44 = 2(a-6)/2 = 2a-6 = 4a = 10
Итак, при a=4, a=15, a=25, и a=10 равенство верно.
1) 42:6=14:(a-2)
42/6 = 7
14/7 = 2
a-2 = 2
a = 4
2) (a+1):4=36:9
(a+1)/4 = 36/9
(a+1)/4 = 4
(a+1) = 16
a = 15
3) 400:(a-5)=120:6
400/(a-5) = 120/6
400/(a-5) = 20
(a-5) = 20
a = 25
4) 88:44=(a-6):2
88/44 = 2
(a-6)/2 = 2
a-6 = 4
a = 10
Итак, при a=4, a=15, a=25, и a=10 равенство верно.