Question

2. Aflați numerele necunoscute din egalitățile de mai jos:
40: m + 4 = 12
(250 - a): 10 + 33 = 41
136 - nx 4 = 100
141 - 5 x (b - 3) = 101
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Answer 1

Răspuns:

Explicație pas cu pas:

$\bf 40: m + 4 = 12$

$\bf 40: m = 12-4$

$\bf 40: m = 8$

$\bf 40 = 8\cdot m$

$\bf 8\cdot m=40$

$\bf m = 40 : 8$

$\red{\underline{\bf m = 5}}$

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$\bf (250 - a): 10 + 33 = 41$

$\bf (250 - a): 10= 41-33$

$\bf (250 - a): 10= 8~~~\bigg|\cdot 10$

$\bf (250 - a)= 8\cdot 10$

$\bf 250 - a= 80$

$\bf 250 = 80+a$

$\bf 250 -80=a$

$\purple{\underline{\bf a=170}}$

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$\bf 136 - n\cdot 4 = 100$

$\bf 136 =100+ n\cdot 4$

$\bf 136 -100= n\cdot 4$

$\bf 36= n\cdot 4$

$\bf n\cdot 4=36$

$\bf n = 36:4$

$\blue{\underline{\bf n = 9}}$

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$\bf 141 - 5 \cdot (b - 3) = 101$

$\bf 141 =101+ 5 \cdot (b - 3)$

$\bf 141-101= 5 \cdot (b - 3)$

$\bf 40= 5 \cdot (b - 3) ~~~\bigg|:5$

$\bf 8= b - 3$

$\bf b = 8+3$

$\pink{\underline{\bf b=11}}$

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