Răspuns :
a)x+5•(33+128)=895 x+5•161=895 x+805=895 x=895-805 x=90 b)x-53•(49-3•12)=996 x-53•(49-36)=996 x-53•13=996 x-689=996 x=996+689 x=1685 c)53+2•x=x+111 2x-x=111-53 x=58 d)23+5•x=2•x+74 5x-2x=74-23 3x=51 x=51:3 x=17
a)x+5•(33+128)=895
x+5•161=895
x+805=895
x=895-805=90
b)x-53•(49-3•12)=996
x-53•(49-36)=996
x-53•13=996
x-689=996
x=996+689=1685
c)53+2•x=x+111
2x=x+111-53=x+58
2x-x=58
x=58
d)23+5•x=2•x+74
5x=2x+74-23=2x+51
5x-2x=51
3x=51
[tex]x = \frac{51}{3} = 17 [/tex]
x+5•161=895
x+805=895
x=895-805=90
b)x-53•(49-3•12)=996
x-53•(49-36)=996
x-53•13=996
x-689=996
x=996+689=1685
c)53+2•x=x+111
2x=x+111-53=x+58
2x-x=58
x=58
d)23+5•x=2•x+74
5x=2x+74-23=2x+51
5x-2x=51
3x=51
[tex]x = \frac{51}{3} = 17 [/tex]