a) \(-7\left(5-x\right)-2\left(x-10\right)=15\)b) \(4\left(2-x\right)+3\left(x-5\right)=14\)c) \(-5\left(2-x\right)+4\left(x-3\right)=10x-15\)d) \(-7\left(3x-5\right)+2\left(7x-14\right)=28\)e) \(5\left(4-x\right)-7\left(-x+2\right)=4-9+3\)f) \(5\left(x-7\right)+10\left(3-x\right)=20\)g) \(-4\left(x+1\right)+8\left(x-3\right)=24\)h) \(4\left(x-1\right)-3\left(x-2\right)=-|-5|\) Giúp mình với, AI NHANH NHẤT MÌNH CHO Ờ...
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a) \(-7\left(5-x\right)-2\left(x-10\right)=15\)
b) \(4\left(2-x\right)+3\left(x-5\right)=14\)
c) \(-5\left(2-x\right)+4\left(x-3\right)=10x-15\)
d) \(-7\left(3x-5\right)+2\left(7x-14\right)=28\)
e) \(5\left(4-x\right)-7\left(-x+2\right)=4-9+3\)
f) \(5\left(x-7\right)+10\left(3-x\right)=20\)
g) \(-4\left(x+1\right)+8\left(x-3\right)=24\)
h) \(4\left(x-1\right)-3\left(x-2\right)=-|-5|\)
Giúp mình với, AI NHANH NHẤT MÌNH CHO Ờ NGHEN!
\(c,-5\left(2-x\right)+4\left(x-3\right)=10x-15\)
\(-10+5x+4x-12=10x-15\)
\(5x+4x-10x-10-12=-15\)
\(-x-10=-3\)
\(-x=7\)
\(x=-7\)
Vậy \(x=-7.\)
Những câu khác bạn nên tự làm...
a) −7. (5 - x) − 2. (x − 10) = 15
-35 + 7x - 2x + 20 = 15
7x - 2x = 35 - 20 + 15
5x = 30
x = 30 : 5
x = 6
Vậy x = 6
b) 4. (2 − x) + 3(x − 5) = 14
8 - 4x + 3x - 15 = 14
8 - 15 - 14 = 4x - 3x
-21 = x
Vậy x = -21
c) −5. (2 − x) + 4. (x − 3) = 10x −15
-10 + 5x + 4x - 12 = 10x - 15
-10 - 12 + 15 = 10x - 5x - 4x
-7 = x
Vậy x = -7
d) −7. (3x − 5) + 2. (7x − 14) = 28
-21x + 35 + 14x - 28 = 28
35 - 28 - 28 = 21x - 14x
-21 = 7x
x = (-21) : 7
x = -3
Vậy x = -3
e) 5. (4 − x) − 7(−x + 2) = 4 − 9 + 3
20 - 5x + 7x - 14 = -2
-5x + 7x = -2 - 20 + 14
2x = -8
x = (-8) : 2
x = -4
Vậy x = -4
f) 5. (x − 7) + 10. (3 − x) = 20
5x - 35 + 30 - 10x = 20
-35 + 30 - 20 = -5x + 10x
-25 = 5x
x = (-25) : 5
x = -5
Vậy x = -5
g) −4. (x + 1) + 8. (x − 3) = 24
-4x - 4 + 8x - 24 = 24
-4x + 8x = 24 + 4 + 24
4x = 52
x = 52 : 4
x = 13
Vậy x = 13
h) 4. (x − 1) − 3. (x − 2) = −|−5|
4x - 4 - 3x + 6 = -5
4x - 3x = -5 + 4 - 6
x = -7
Vậy x = -7