Question

1. Determine o conjunto solução das equações do 1º grau a seguir:

X+50=60
X+18=14
2X-4=20
3X-7=8
4X+12=18
X+2=13
2X+10=X+17
3X-18=X+38​

Answer 1

A)S= {10}

$x + 50 = 60$

$x = 60 - 50$

$x = 10$

B)S= {-4}

$x + 18 = 14$

$x = 14 - 18$

$x = - 4$

C) S= {12}

$2x - 4 = 20$

$2x = 20 + 4$

$x = \frac{24}{2}$

$x = 12$

D) S= {5}

$3x - 7 = 8$

$3x = 8 + 7$

$3x = \frac{15}{3}$

$x = 5$

E) S= {6/4}

$4x + 12 = 18$

$4x = 18 - 12$

$x = \frac{6}{4}$

F) S= {11}

$x + 2 = 13$

$x = 13 - 2$

$x = 11$

G) S= {7}

$2x + 10 =x + 17$

$x = 17 - 10$

$x = {7}$

H) S= {28}

$3x - 18 = x + 38$

$2x = 38 + 18$

$x = \frac{56}{2}$

$x = 28$