Question

18. 4x +3=15+2x
Can someone help me solve this number and also 19,20,21,22,23,24,25

Answer 1

`{:}\longrightarrow`
`\sf 4x+3=15+2x`

`{:}\longrightarrow`
`\sf 4x-2x=15-3`

`{:}\longrightarrow`
`\sf 2x=12`

`{:}\longrightarrow`
`\sf x={(12)/(2)}`

`{:}\longrightarrow`
`\sf x=6`

__________________

21-

`{:}\longrightarrow`
`\sf 3a-2=5+5a-7`

`{:}\longrightarrow`
`\sf 3a-2=5a-2`

`{:}\longrightarrow`
`\sf 3a-5a=-2+2`

`{:}\longrightarrow`
`\sf -2a=0`

`{:}\longrightarrow`
`\sf a={\frac {1}{-2}}`

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22-

`{:}\longrightarrow`
`\sf 11x-18=2+6x+1+2x`

`{:}\longrightarrow`
`\sf 11x-18=8x+3`

`{:}\longrightarrow`
`\sf 11x-8x=3+18`

`{:}\longrightarrow`
`\sf 3x=21`

`{:}\longrightarrow`
`\sf x={\frac {21}{3}}`

`{:}\longrightarrow`
`\sf x=7`

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23-

`{:}\longrightarrow`
`\sf e+3+e=40-(-2)+5e`

`{:}\longrightarrow`
`\sf 2e+3=42+5e`

`{:}\longrightarrow`
`\sf 2e-5e=42-3`

`{:}\longrightarrow`
`\sf -3e=39`

`{:}\longrightarrow`
`\sf e={\frac {39}{-3}}`

`{:}\longrightarrow`
`\sf e=-13`