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Află numărul necunoscut: a) 24 x 15+ a = 420 b) 23 x 56-b = 843 c) C-75 x 45 = 1000 c​

Răspuns :

Răspuns:

Explicație pas cu pas:

[tex]24\cdot15+a=420[/tex]

[tex]360+a=420[/tex]

[tex]a=420-360[/tex]

[tex]\blue{\underline{a=60}}[/tex]

===============

[tex]23\cdot56-b=843[/tex]

[tex]1288-b=843[/tex]

[tex]b=1288-843[/tex]

[tex]\purple{\underline{b=445 }}[/tex]

===============

[tex]c-75\cdot45=1000[/tex]

[tex]c-3375=1000[/tex]

[tex]c=3375+1000[/tex]

[tex]\red{\underline{c=4375}}[/tex]  

Răspuns:

a) 24×15+a=420

360+a=420

a=420-360

a=60

b) 23×56-b=863

1228-b=863

b=1228-863

b=445

c) 75×45=1000

c-3375=1000

c=3375+1000

c=4375