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Sagot :
Hi,
4a - 11 = 2a + 3
4a - 11 + 11 = 2a + 3 + 11
4a = 2a +14
4a - 2a = 2a - 2a + 14
2a = 14
2a / 2 = 14 / 2
a = 7
3z + 12 = 15
3z + 12 - 12 = 15 - 12
3z = 3
3z / 3 = 3 / 3
z = 1
2 - 6b = 20
2 - 2 - 6b = 20 - 2
- 6b = 18
6b = - 18
6b / 6 = -18 / 6
b = -3
3y - 5 = 27 - y
3y - 5 + 5 = 27 - y + 5
3y = - y +32
3y + y = - y + y +32
4y = 32
4y / 4 = 32 / 4
y = 8
✅(◠‿◕)
♪Answer :
#A
- 4a - 11 = 2a + 3
- 4a - 2a = 3 + 11
- 2a = 14
- a = 14/2
- a = 7✅
#B
- 3z + 12 = 15
- 3z = 15 - 12
- 3z = 3
- z = 3/3
- z = 1✅
#C
- 2 - 6b = 20
- -6b = 20 - 2
- -6b = 18
- b = 18/(-6)
- b = -3✅
#D
- 3y - 5 = 27 - y
- 3y + y = 27 + 5
- 4y = 32
- y = 32/4
- y = 8✅
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