1)x-140:35=270
2)(x-140):35=270
3)x:15+42=15+25*8
4)x-6:2-(48-24*2:6-3)=0
5)(2009-x):29+32=100
6)(x+200):4=460+85*4
7)55-x+33=76
8)(x-2)*3-270:45=120
1)x-140:35=270
2)(x-140):35=270
3)x:15+42=15+25*8
4)x-6:2-(48-24*2:6-3)=0
5)(2009-x):29+32=100
6)(x+200):4=460+85*4
7)55-x+33=76
8)(x-2)*3-270:45=120
Đáp án:
Giải thích các bước giải:
1) x- 140 : 35=270
x – 4=720
x = 724
2) (x-140):35=270
x-140 = 270 x 35
x-140 = 9450
x = 9590
3) x:15+42=15+25×8
x:15+42=15 +200
x:15+42 = 215
x:15 = 215 – 42
x:15 = 173
x = 173×15
x =2595
1) x-140:35=270
x-4=270
x=270+4
x=274
2) (x-140):35=270
x-140=270*35
x-140=9450
x=9450+140
x=9590
3) x:15+42=15+25*8
x:15+42=15+200
x:15+42=215
x:15=215-42
x:15=173
x=173*15
x= 2595
4) x-6:2-(48-24*2:6-3)=0
x-3-37=0
x-3=37
x=12,3
5) (2009-x):29+32=100
(2009-x):29=100-32
(2009-x):29=68
(2009-x)=68*29
2009-x=1972
x=2009-1972
x=37
6) (x+200):4=460+85*4
(x+200):4=800
x+200=800*4
x+200=3200
x=3000
7) 55-x+33=76
55-x=76-33
55-x=43
x=55-43
x=12
8) (x-2)*3-270:45=120
(x-2)*3-270=120*45
(x-2)*3-270=5400
(x-2)*3=5400+270
(x-2)*3=5670
x-2=1890
x=1892