利用等式的性质解下列方程:1、4x-8=6x+2 2、-y/2-3=9
人气:467 ℃ 时间:2020-05-09 08:34:39
解答
4x-8=6x+2
4x-8+8=6x+2 +8
4x=6x+10
4x-4x=6x-4x+10
2x+10=0
2x+10-10=0-10
2x=-10
2x÷2=-10÷2
x=-5
-y/2-3=9
-y/2-3+3=9+3
-y/2=12
-y/2*2=12*2
-y=24
-y*(-1)=24*(-1)
y=-24
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