\(4x-x+18=600\Leftrightarrow3x+18=600\Leftrightarrow3x=600-18\)
\(\Leftrightarrow3x=582\Leftrightarrow x=582:3\Leftrightarrow x=194\)
\(5x+2x+140=700\Rightarrow5x+2x=700-140\)
\(5x+2x=560\Leftrightarrow x\left(5+2\right)=560\)
\(7x=560\Leftrightarrow x=560:7\)
\(x=80\)
4.x - x + 18 = 600 5 . x + 2 . x + 140 = 700
3 . x + 18 = 600 7 . x + 140 = 700
3 . x = 600 - 18 7 . x = 700 - 140
3 . x = 582 7 . x = 560
x = 582 : 3 x = 560 : 7
x = 80
x = 194
\(4\cdot x-x+18=600\)
\(4\cdot x-x=60-18\)
\(4\cdot x-x=42\)
\(x\cdot\left(4-1\right)=42\)
\(x\cdot3=42\)
\(x=42:3\)
\(x=14\)
\(5\cdot x+2\cdot x+140=700\)
\(5\cdot x+2\cdot x=700-140\)
\(5\cdot x+2\cdot x=560\)
\(x\cdot\left(5+2\right)=560\)
\(x\cdot7=560\)
\(x=560:7\)
\(x=80\)
