Question

Rút gọn biểu thức​

(a+b-c)-(b-c+d)​

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Answer 1

(a+b-c)-(b-c+d)

= a+b-c-b+c-d

= a+(b-b)+(c-c)+d

= a+0+0+d

=a+d

Answer 2

(a+b-c)-(b-c+d)

= a+b-c-b+c-d

= a+(b-b)+(c-c)+d

= a+0+0+d

=a+d

Answer 3

(a + b - c)-(b - c + d)

= a + b - c - b + c - d

= a + (b-b) + (c-c) + d

= a + 0 + 0 + d

= a + d