Question

1)Encontre o valor de X:

4x - 20 = 54

12x + 112 + 18 = 230

8x - 15 = 3x

2x + 10 - 15 + 3x = 5​

Answer 1

Explicação passo-a-passo:

a)

4x - 20 = 54

4x = 54 + 20

4x = 74

x = 74/4

x = 37/2

b)

12x + 112 + 18 = 230

12x + 130 = 230

12x = 230 - 130

12x = 100

x = 100/12

x = 25/3

c)

8x - 15 = 3x

8x - 3x = 15

5x = 15

x = 15/5

x = 3

d)

2x + 10 - 15 + 3x = 5

5x - 5 = 5

5x = 5 + 5

5x = 10

x = 10/5

x = 2

Answer 2

4x-20=54
4x=54+20
X=74/4
X=13,5

12X+112+18=230
12X= 230-112-18
12X=100
X=100/12
X=8,333

8x-15=3x
8X-3x=15
5X=15
X=15/5
X=3

2x+10-15+3X=5
2x+3x=5-10+15
5X=10
X=10/5
X=2