-2ab
The LCM is 280a4b2.
5a(a(a-5)+3)
It's not always to 'solve' as it is to 'simplify' EX: 15a + 3b = 45c simplifies to 5a + b = 15c
I think it is 3.14 that equals to pi when u solve it
Add 54 to both sides and you get 15a = 45. I think a chimp could solve this one. (a=3)
-2ab
If you mean: 15a = 6a - 90 then the variable a works out as -10. If you mean 15a + 6a - 90, then it equals 21a - 90.
7ab-5ab = 2
7ab itself
The LCM is 280a4b2.
7b
5a(a(a-5)+3)
It's not always to 'solve' as it is to 'simplify' EX: 15a + 3b = 45c simplifies to 5a + b = 15c
x would be 5.
35ab
Two negatives make a positive so your equation simplifies firstly as 4ab + 3ab and finally as 7ab.