[tex]\displaystyle 1)\left \{ {{3x+y=4} \atop {5x-2y=14}} \right.\\ \\\left \{ {{y=4-3x} \atop {5x-2y=14}} \right. \\\\5x-2(4-3x)=14\\x=2\\y=4-3*2\\y=-2\\(x,y)=(2,-2)\\\\2)\left \{ {{4x+3y=3} \atop {2x-2y=5}} \right.\\ \\2(4x+3y)+3(2x-2y)=2*3+3*5\\14x=21\\\\x=\frac{3}{2}\\ \\4*\frac{3}{2}+3y=3\\ \\y=-1\\\\(x,y)=(\frac{3}{2},-1)[/tex]