Question

Matemática
1. Simplifique cada uma das seguintes expressões algébricas efetuando as adições algébricas
a) x + 3x – x + 5x – x =
=
b) 4ab + 5ab - 2ab + 3ab
c) 7y + 2y - x + 3y + 5x =
d) 5y + 4y – 7y - y +9y – 11y =
e) 10xy - 3xy + xy - 2xy + 5xy =
f) 5x + 4y - 1+ 2y - x +4 – 2x -- 3y =
g) 7a – 5b – 9a + 2b + 2a + 6b + a =
h) 6x - 5y + 3xy + 2xy – 5x + 9y + 4x – xy - y =
i) 8x - 6y +1+ 7x - 6x – 3 - 3y + y - 5 =
j) 7a + 5b - 90 + 13b + 10c – 5a - 8b+c=​

Answer 1

Resposta:

Explicação passo-a-passo:

a) x+3x-x+5x-x

3x+5x-x

7x

b) 4ab+5ab-2ab+3ab

(4+5-2+3)ab

10ab

c) 7y+2y-x+3y+5x

12y-x+5x

12y+4x

4(3y+x)

4(3y+x)

d) 5y+4y-7y-y+9y-11

5y+4y-7y-1y+9y-11

(5+4-7-1+9)y-11

10y-11

e) 10xy-3xy+xy-2xy+5xy

11xy

f) 5x+4y-1+2y-x+4-2xy+5xy

4x+4y-1+2y+4-2xy+5xy

4x+6y-1+4-2xy+5xy

4x+6y+3-2xy+5xy

4x+6y+3+3xy

4x+6y+3+3xy

g) 7a-5b-9a+2b+2a+6b+a

7a-45ab+2b+2a+6b+a

10a-45ab+2b+6b

10a-45ab+8b

10a-45ab+8b

h) 6x-5y+3xy+2xy-5x+9y+4x-xy-y

5x-5y+3xy+2xy+9y-xy-y

5x+3y+3xy+2xy-xy

5x+3y+4xy

5x+3y+4xy

i) 8x-6y+1+7x-6x-3-3y+y-5

9x-6y+1-3-3y+y-5

9x-8y+1-3-5

9x-8y-7

9x-8y-7

j) 7a+5b-90+13b+10c-5a-8b+c

2a+5b-90+13b+10c-8b-c

2a+10b-90+10c-c

2a+10b-90+9c

2a+10b-90+9c