rozwiąż układ równań : 4(2x+3)-2(4y-1)=30 5x+1/3-y-3/4=3

4(2x+3)-2(4y-1)=30 5x+1 /3 - y-3 /4 = 3 8x+12-8y+2=30 20x+4 /12 - 3y-9 /12 = 3 8x-8y=16 20x+4-3y+9=36 x-y=2 20x-3y=23 -3x+3y=-6 20x-3y=23 17x= 17 x=1 1-y=2 y=-1 x=1 y=-1

4(2x+3)-2(4y-1)=30 (5x+1)/3-(y-3)/4=3 8x+12-8y+2=30 (20x+4)/12-(3y-9)/12=3 /×12 8x-8y=30-14 /÷8 20x+4-3y+9=36 x-y=2 20x-3y=23 x=2+y 20(2+y)-3y=23 40+20y-3y=23 17y = -17 /÷17 y= -1 x-y=2 x-(-1)=2 x+1=2 /-1 x=1 x=1 y=-1

4(2x+3)-2(4y-1)=30 5x+⅓ -y-¾=3 8x+12-8y+2=30 5x-y= 3+¾-⅓ 8x-8y=30-2-12 5x-y= 3+ 9/12 - 4/12 8x-8y= 16 5x-y=3 +5/12 8x-8y=16 5x-y=41/12 /*12 8x-8y=16 /*(-3) 60x-12y=41 /*2 -24x+24y=-48 120x-24y=82 96x=34 /:96 x=34/96 170/96 - y= 41/12 -y= 41/12 - 170/96 -y= -33/96- 170/96 -y= -203/96 y=203/96 x=34/96 y=2 11/96