Question

determine o valor das seguintes equações ​

Answer 1

Resposta:

b)3

c)11

d)12

e)28

2)a)$\frac{1}{2}$

b)$\frac{1}{4}$

c)5

Explicação passo-a-passo:

b)

$2*3+5-3^{2} \\6+5-9\\11-9\\3$

c)

$2(5+3)-5\\2*8-5\\16-5\\11$

d)

$2x^{3} -2^{2} +2*2+4\\8-4+4+4\\12$

e)

$2*3^{2} +4*3-2\\2*9+12-2\\18+10\\28$

2)

a)

$2(x+3)=7\\2x+6=7\\2x=7-6\\2x=1\\x=\frac{1}{2}$

b)

$-2(2x-3)=5\\-4x+6=5\\-4x=5-6\\-4x=-1\\4x=1\\x=\frac{1}{4}$

c)

$-(x-1)=2(3-x)\\-x+1=6-2x\\-x+2x=6-1\\x=5$