Question

Help me ! solve for x :


`\curvearrowright \: \sf \: x + 2x + x = 2x + 4`
​

Answer 1

`x + 2x + x = 2x + 4 \\ 4x = 2x + 4 \\ 4x - 2x = 4 \\ 2x = 4 \\ \\ x = (4)/(2) \\ \\ x = 2`

Answer 2

x = 2

Step-by-step explanation:

`\rightarrow \sf x + 2x + x = 2x + 4`

add similar terms

`\rightarrow \sf 4x = 2x + 4`

subtract both sides by 2x

`\rightarrow \sf 4x -2x= 2x + 4-2x`

subtract similar terms

`\rightarrow \sf 2x= 4`

divide both sides by 2

`\rightarrow \sf x= 2`

Check :

x + 2x + x = 2x + 4

insert x = 2

2 + 2(2) + 2 = 2(2) + 4

multiply

8 = 8

Hence proved that x = 2