配套习题- 等式的性质 -【青果学院】

1/5单选题

难度：

1.下列说法：①在等式2x=4两边都加上2，可得等式4x=6；②在等式2x=4两边都乘以

，可得等式x=8；③在等式2x=4两边都除以2，可得等式x=2；④等式两边都除以同一个数等式仍然成立，其中错误的有（）

A	1个
B	2个
C	3个
D	4个

正确答案：Qw==

4pGg5Zyo562J5byPMng9NOS4pOi+uemDveWKoOS4ijLvvIzlj6/lvpfnrYnlvI8yeCsyPTbvvJvikaHlnKjnrYnlvI8yeD005Lik6L656YO95LmY5LulPGltZyB3aWR0aD0xNiBoZWlnaHQ9Mzcgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8zRS9CQi9yQkFDSmxUSXRjM2pJN0g1QUFBQk8zZkp3bDg5MTYucG5nIj7vvIzlj6/lvpfnrYnlvI94PTLvvJvikaLmraPnoa7vvJvikaPnrYnlvI/kuKTovrnpg73pmaTku6XlkIzkuIDkuKrkuI3kuLrpm7bnmoTmlbDvvIznrYnlvI/ku43nhLbmiJDnq4vjgILmiYDku6Xlj6rmnInikaLmraPnoa7jgILmlYXpgIlD

2/5单选题

难度：

2.已知a=b，则下列等式不成立的是（）

A	a-b=0
B	-3a=-3b
C
D	2a+c=2b+c

正确答案：Qw==

Qy7nrYnlvI/kuKTovrnvvIzpmaTku6XlkIzkuIDkuKrmlbDopoHms6jmhI/vvIzov5nkuKrmlbDlv4XpobvkuI3kuLrpm7bjgILkuI3og73noa7lrpo8aW1nIHdpZHRoPTYxIGhlaWdodD0zOCBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzNFL0Y5L3JCQUNKMVRJdGRMeUVRNmtBQUFCOW5IbURVczAyMS5wbmciPuS4rWPmmK/lkKbkuLrpm7bvvIzmiYDku6VD6ZSZ6K+v77yM6YCJQ+OAgg==

3/5单选题

难度：

3.若a=b，则在①

，②

，③

，④3a-1=3b-1中，正确的有（）

A	.1个
B	2个
C	3个
D	4个

正确答案：Qw==

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

4/5单选题

难度：

4.下列各式变形正确的是（）

A	由x+7=1，得x=8
B	由x-7=1，得x=8
C	由3x=1，得x=3
D	由，得x=2

正确答案：Qg==

QS4g55SxeCs3PTHvvIzlvpd4PS0277ybQi7mraPnoa7vvJtDLiDnlLEzeD0x77yM5b6XeD08aW1nIHdpZHRoPTcgaGVpZ2h0PTQyIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvM0UvQkIvckJBQ0psVEl0ZG5SWC1tdEFBQUJNUWhoWDRrNjc2LnBuZyI+77ybRC4g55SxPGltZyB3aWR0aD00NCBoZWlnaHQ9Mzcgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8zRS9CQi9yQkFDSmxUSXRkbVFtR1pnQUFBQjBQNGhyQVU5MjcucG5nIj7vvIzlvpd4PTAs77yb5pWF6YCJQg==

5/5单选题

难度：

5.下列变形正确的是（）

A	若3x-1=2x+1，则x=O
B	若ac=bc，则a=b
C	若a=b，则
D	若，则y=x

正确答案：RA==

QS4g6IulM3gtMT0yeCsx77yM5YiZeD0y77ybQi7nrYnlvI/kuKTovrnpmaTku6XlkIzkuIDkuKrmlbDvvIzopoHkv53or4Hov5nkuKrmlbDkuI3kuLrpm7bvvIzkuI3og73liKTmlq1j5piv5ZCm5Li66Zu244CCQy4g5ZCM55CG5LqOQuOAgkTmraPnoa7vvIzmlYXpgIlE44CC