Answer:
1.
2(2x-5)-7(2x-1)=3
Multiply both sides of the equation by 14, the least common multiple of 7,2.
2(2x−5)−7(2x−1)=42
Use the distributive property to multiply 2 by 2x−5.
4x−10−7(2x−1)=42
Use the distributive property to multiply −7 by 2x−1.
4x−10−14x+7=42
Combine 4x and −14x to get −10x.
−10x−10+7=42
Add −10 and 7 to get −3.
−10x−3=42
Add 3 to both sides.
−10x=42+3
Add 42 and 3 to get 45.
−10x=45
Divide both sides by −10.
x= −10/45
Reduce the fraction to lowest terms by extracting and canceling out 5.
x=− 2/9
2. I don't know this one. Sorry.
3. is in the file