點樣去解這條,有步驟!
1. 7-y=3
2.3-4x=7
thanks!
equation
2011-09-28 1:57 am
回答 (3)
2011-09-28 2:43 am
✔ 最佳答案
1. 7-y=37-y+y=3+y
7=3+y
7-3=y
y=4
2. 3-4x=7
3-3-4x=7-3
-4x=4
-4x/-4 =4/-4
x=-1
1. s=2t, and t=5
sub. t=5
s=2(5)
=10
2. w=g+3 and g=2
sub g=2,
w=(2)+3
=5
2011-09-29 4:04 am
1.
7-y=3
-y=3-7
-y=-4
y=4
2.
3-4x=7
-4x=7-3
-4x=4
x=-1
using the method of substitution, find thee value of the remaining unknown in ech of the following formulas.
1. s=2t if t =5
sub. t=5
2t=s
2(5)=10
2. w=g+3 if g=2
sub. g=2
g+3=w
2+3=5
7-y=3
-y=3-7
-y=-4
y=4
2.
3-4x=7
-4x=7-3
-4x=4
x=-1
using the method of substitution, find thee value of the remaining unknown in ech of the following formulas.
1. s=2t if t =5
sub. t=5
2t=s
2(5)=10
2. w=g+3 if g=2
sub. g=2
g+3=w
2+3=5
參考: Tracy
2011-09-28 2:46 am
1.)7-y=3
-y=-4
y=4
2.)3-4x=7
-4x=4
x=-1
using the method of substitution, find thee value of the remaining unknown in each of the following formulas.
1.)s=2t if t =5
s=2(5)
s=10
2.)w=g+3 if g=2
w=2+3
w=5
希望幫到你啦=]
-y=-4
y=4
2.)3-4x=7
-4x=4
x=-1
using the method of substitution, find thee value of the remaining unknown in each of the following formulas.
1.)s=2t if t =5
s=2(5)
s=10
2.)w=g+3 if g=2
w=2+3
w=5
希望幫到你啦=]
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