Question

ME AJUDA

1)$x + 5 = 19$

2)$3x - 1 = 14$

3)$7 = 19 - 2x$

4)$10 - 4x = x$

5)$3x + 5 = x + 15$

6)$10 - 2x = 3x$
​

Answer 1

Resposta:

1) 14

2) 5

3) 6

4) 2

5) 5

6) 2

Explicação passo-a-passo:

1) $x+5=19\\x=19-5\\x=14$

2) $3x -1=14\\3.5-1\\15-1\\1 4$ (x=5)

3) $7= 19-2x\\2x+7=19\\2x=19-7\\2x = 12\\x=\frac{12}{2} \\x=6$

4) $10-4x=x\\-4x = x-10\\-4x-x=10\\-5x = 10 \\-5x = -10 (-1) \\x= \frac{10}{5} \\x=2$

5) $3x+5 = x+15 \\3x-x=15-5\\2x=10\\x= \frac{10}{2}\\ x=5$

6) $10 - 2x = 3x \\-2x-3x=-10\\-5x=-10 (-1)\\5x=10\\x=\frac{10}{5} \\x=2$

Answer 2

1) x + 5 = 19 , x = 19 - 5 = 14

2) 3x - 1 = 14, 3x = 15, x = 5

3) 7 = 19 - 2x, 2x = 12, x = 6

4) 10 - 4x = x, 5x = 10, x = 2

5) 3x + 5 = x + 15, 2x = 10, x = 5

6) 10 - 2x = 3x, 5x = 10 , x = 2