Question

[©ⓢ丶κεη春╰‿╯]

a)\(7+2x=22-3x\)

b)\(8x-3=5x+12\)

c)\(x-12+4x=25+2x-1\)

d)\(x+2x+3x-19=3x+5\)

e)\(7-\left(2x+4\right)=-\left(x+4\right)\)

f)\(\left(x-1\right)-\left(2x-1\right)=9-x\)

Answer 1

[Trí Tiên]

a) \(7+2x=22-3x\)

\(\Leftrightarrow5x=15\Leftrightarrow x=3\)

b) \(8x-3=5x+12\)

\(\Leftrightarrow3x=15\Leftrightarrow x=5\)

c) \(x-12+4x=25+2x-1\)

\(\Leftrightarrow3x=36\Leftrightarrow x=12\)

d) \(x+2x+3x-19=3x+5\)

\(\Leftrightarrow3x=24\Leftrightarrow x=8\)

e) \(7-\left(2x+4\right)=-\left(x+4\right)\)

\(\Leftrightarrow x=7\)

f) \(\left(x-1\right)-\left(2x-1\right)=9-x\)

\(\Leftrightarrow0x=9\) ( vô lí )