Question

Ajutor ;-; Si repede
5. Află numerele necunoscute :
a) (a - 180) × 10 = 200
b) 30 × 6 - 16 ÷ 2 - b = 19
c) (c + 15) ÷ 5 = 64 ÷ 8

Answer 1

a. (a-180)×10=200 => a-180=200÷10
a-180=20 => a=180+20=200

b. 30×6-16÷2-b=19
180-8-b=19
172-b=19 => b=172-19=153

c. (c+15)÷5=64÷8
(c+15)÷5=8 => c+15=8×5
c+15=40 => c=40-15=25

Answer 2

(a-180)×10=200
a-180=200÷10
a-180=20
a=20+180
a=200

30×6-16÷2-b=19
180-8-b=19
172-b=19
b=172-19
b=153

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