Rozwiazać: 2(x+1)=x 2t-(3t+1)=6 -(4+x)=2(3-x) 3(y+6)-y+2(y+9) ( x-7)-2(3x+5)3

1) 2(x+1)=x 2x + 2=x /-2x 2=-x /*(-1) x= -2 2) 2t-(3t+1)=6 2t + 3t - 1 = 6 5t - 1=6 /+1 5t = 7 /:5 t=1,4 3) -(4+x)=2(3-x) 4-x=6-2x /-4 -x =2-2x /+2x x=2 4) 3(y+6)-y+2(y+9)= 3y+18-y+2y+18 = 4y+36 Liczę na najlepsze ;)

a) 2(x+1)=x 2x+2=x 2= x -2x 2= -x x=-2 b) 2t-(3t+1)=6 -1t+1=6 -1t= 6-1 -t = 5 t= -5 c) -(4+x)=2(3-x) -4+(-x)=6-2x -4-x=6-2x -4-6=-2x+x -10=-x x=10 d) 3(y+6)-y+2(y+9) 3y+18-y+2y+18 4y+36 e) (x-7)-2(3x+5)3 (x-7) -6x -10x3 x-7-6x-10*3 -5x-37

2(x+1)=x 2x+2=x 2x-x= -2 x= -2 2t-(3t+1)=6 2t-3t-1=6 -t=7 /*(-1) t=-7 -(4+x)=2(3-x) -4-x=6-2x -x+2x=6+4 x=10 3(y+6)-y+2(y+9)=3y+18-y+2y+18=4y+36 ( x-7)-2(3x+5)3=x-7-(6x+10)3=x-7-18x-30= -17x-37