\(a,3.\left(2x-3\right)+4.\left(3x-3\right)=19\)
\(\Leftrightarrow6x-9+12x-12=19\)
\(\Leftrightarrow18x-21=19\)
\(\Leftrightarrow18x=40\)
\(\Leftrightarrow x=\frac{20}{9}\)
\(b,4\cdot\left(2x-1\right)-3\cdot\left(2x+3\right)=13\)
\(\Leftrightarrow8x-4-6x-9=13\)
\(\Leftrightarrow2x-13=13\)
\(\Leftrightarrow2x=26\)
\(\Leftrightarrow x=13\)
\(c,5\cdot\left(6x-3\right)-3\cdot\left(4x-5\right)=19\)
\(\Leftrightarrow30x-15-12x+15=19\)
\(\Leftrightarrow18x=19\)
\(\Leftrightarrow x=\frac{19}{18}\)
Kết bạn với mình nha
A) Ta có : 3(2x - 3) + 4(3x - 3) = 19
<=> 6x - 9 + 12x - 12 = 19
<=> 18x - 21 = 19
=> 18x = 40
=> x = \(\frac{20}{9}\)
