There are infinitely many possible answers.
Start with the sum of two integers:
45+45, 44+46, 43+47, ... , 1+89, 0+90, -1+91, -2+92, ...
then add in 1 decimal places:
44.9+45.1, 44.8+45.2, etc
then 2 decimal places
etc.
Then add in irrationals:
45-sqrt(2) and 45+sqrt(2), 44-sqrt(2) and 46+sqrt(2),
and again, 1 decimal place, 2 , 3, ... decimal places.
Then try multiplications
1*90, 2*45, 3*30, 4*22.5, 5*18 etc
and then add decimal places here.
And so far we have dealt with pairs. Move on to triplets and foursomes and so on.
I hope that by this stage (if not sooner), you have recognised the futillity of hoping for a straight answer to a question that does not have a straight answer!
It equals 90
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.
90 + 90 + 60 = 240
20 x 90 = 180020 times 90 equals 18 times 100 equals 1800.
2.5*36 = 90
It equals 90
90+b=2x70 90+b=140 90-90+b=140-90 b=50
270
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.
To find what number multiplied by 7 equals 630, you would divide 630 by 7. This calculation gives you 90, as 7 multiplied by 90 equals 630. Therefore, the answer is 90.
90 + 90 + 60 = 240
90
20 x 90 = 180020 times 90 equals 18 times 100 equals 1800.
81
90 x 90 = 8,100
90 degrees Fahrenheit equals (90 - 32) / 1.8 = 32 degrees Celsius.
The equal sign is the same as the enter button