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100-(7×n-3×n)=60
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Răspuns :

Răspuns:

[tex]100-(7*n-3*n)=60\\\\100-4n=60\\\\4n=100-60\\\\n=40:4\\\\n=10[/tex]

Răspuns:

[tex]\boldsymbol {\red{10}}[/tex]

Explicație pas cu pas:

[tex]100-(7 \times n-3 \times n)=60[/tex]

[tex]100-(7 - 3) \times n=60[/tex]

[tex]100-4 \times n=60[/tex]

[tex]4 \times n = 100 - 60[/tex]

[tex]4 \times n = 40[/tex]

[tex]n = 40 : 4[/tex]

[tex] \bf n = 10[/tex]

Verificare: 100-(7×10-3×10) = 100 - (70 - 30) = 100 - 40 = 60