Rozwiąż równanie 6+2y=-5 +3y 4-x = 2x+1 7y+8=8y+12 3y+5=y+6 2x-2=7-x 10+5x=4-2x

6+2y=-5 +3y 2y - 3y = - 5 - 6 -y = - 11  /*(-1) y=11 spr. 6+2y=-5 +3y L= 6 + 2y = 6 + 2*11= 6 + 22= 28 P= -5 +3y = - 5 + 3*11= - 5+33= 28 28=28 L=P 4-x = 2x+1 -x - 2x= 1 - 4 -3x= -3 x= - 3 : (-3) x= 1 spr. 4-x = 2x+1 L= 4-x= 4 - 1= 3 P= 2x + 1= 2*1 + 1= 2 + 1= 3 3=3 L=P 7y+8=8y+12 7y - 8y = 12 - 8 -y= 4  /*(-1) y= -4 spr. 7y+8=8y+12 L= 7y + 8 = 7 *(-4) + 8 = - 28 + 8 = - 20 P= 8y + 12= 8*(-4) + 12= - 32 + 12= - 20 -20=-20 L=P 3y+5=y+6 3y - y = 6 - 5 2y = 1 y = 1 : 2 y = 0,5 spr. 3y+5=y+6 L= 3y + 5= 3 * 0,5 + 5 = 1,5 + 5= 6,5 P= y + 6= 0,5 + 6= 6,5 6,5 = 6,5 L=P 2x-2=7-x 2x +x= 7 +2 3x= 9 x= 9 : 3 x= 3 spr. 2x-2=7-x L= 2x - 2= 2*3 - 2 = 6-2= 4 P= 7-x= 7 - 3= 4 4=4 L=P 10+5x=4-2x 5x +2x= 4 - 10 7x = -6 x= - 6 : 7 x= - 6/7 spr. 10+5x=4-2x L= 10 + 5x= 10 + 5*(-6/7) = 10 - 30/7= 10 - 4 i 2/7 = 5 i 5/7 P= 4-2x= 4 - 2*(-6/7) 4 + 12/7= 4 + 1 i 5/7= 5 i 5/7 5 i 5/7= 5 i 5/7 L=P