Question

Calculează X+Y+Z+K stiind ca:
Y=144:X K=72:Z Y:Z=K Kx5=45

Answer 1

Răspuns:  91

Explicație pas cu pas:k

y = 144 : x;   k = 72 : z;   y : z = k   si  k × 5 = 45

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k × 5 = 45

k = 45 : 5

k = 9

___________

k = 72 : z

9 = 72 : z

z = 72 : 9

z = 8

____________

y : z = k

y : 8 = 9

y = 9 × 8

y = 72

__________

y = 144 : x

72 = 144 : x

x = 144 : 72

x = 2

____________

x + y + z + k = 2 + 72 + 8 + 9 = 91 → suma numerelor