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Afla numerele necunoscute
a) (a-180)x10=200
b) 30x6-16:2-b=19
c) (c+15):5=64 : 8

Răspuns :

Rapunzel15
a) (a-180)×10 = 200
(a-180) = 200:10
a-180 = 20
a = 20+180
a = 200

b) 30×6-16:2-b = 19
180-8-b = 19
173-b = 19
b = 173-19
b = 154

c) (c+15):5 = 64:8
( c+15):5 = 8
c + 15 = 8×5
c +15 = 40
c = 40-15
c = 25

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