Question

a)x+x-4=17-2x+1
b)3,4x-2,6x=x-0,92
b)0,1x+3x+0,9x=14+2x

Answer 1

Olá,

a)

$x + x - 4 = 17 - 2x + 1 \\ 2x + 2x = 18 + 4 \\ 4x = 22 \\ x = 22 \div 4 \\ x = 5.5$

b)

$3.4x - 2.6x = x - 0.92 \\ 0.8 - x = - 0.92 \\ - 0.2x = - 0.92 \\ x = - 0.92 \div( - 0.2) \\ x = 4.6$

c)

$0.1x + 3x + 0.9x = 14 + 2x \\ 4x - 2x = 14 \\ 2x = 14 \\ x = 14 \div 2 \\ x = 7$

Espero ter ajudado :-) Bons estudos.