4/5+1/2x=9/109/10-1/2x=4/54x+2(8-x)=2620x+15(50-x)=8800.7m:15dm
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4/5+1/2x=9/109/10-1/2x=4/54x+2(8-x)=2620x+15(50-x)=8800.7m:15dm
4/5+1/2x=9/10
9/10-1/2x=4/5
4x+2(8-x)=26
20x+15(50-x)=880
0.7m:15dm
4/5+1/2x=9/109/10-1/2x=4/54x+2(8-x)=2620x+15(50-x)=8800.7m:15dm
4/5+1/2x=9/10
x/2=9/10-4/5
x/2=1/10
x=1/5
9/10-1/2x=4/5
1/2x=9/10-4/5
x=1/5
4x+2(8-x)=26
4x+16-2x=26
2x=26-16
x=5
20x+15(50-x)=880
20x+750-15x=880
5x=130
x=26
0.7m:15dm=7dm:15dm=7:15=7/15
4/5+1/2x=9/10
1/2x=9/10-8/10=1/10
x=1/5
9/10-1/2x=4/5
1/2x=9/10-8/10=1/10
x=1/5
4x+2(8-x)=26
4x+16-2x=26
2x=10
x=5
20x+15(50-x)=880
20x+750-15x=880
5x=130
x=26
0.7m:15dm=7dm:15dm=7:15
(1)4/5+1/2x=9/10
1/2x=9/10-4/5=1/10
x=2*1/10=1/5
(2)9/10-1/2x=4/5
1/2x=9/10-4/5=1/10
x=1/5
(3)4x+2(8-x)=26
4x+16-2x=26
2x=10
x=5
(4)20x+15(50-x)=880
4x+3(50-x)=176
4x+150-3x=176
x=176-150=26
(5)0.7m:15dm=7dm:15dm=7:15
1/2x=1/10 x=1/5
1/2x=1/10 x=1/5
2x+16=26 2x=10 x=5
5x+750=880 5x=130 x=26
7dm:15dm=7:15