Can someone me write an equation and solve it for this word problem? two is subtracted from a number, and then the difference is multiplied by 5. the result is 30. find the number.

An isosceles triangle has two sides of equal length, a, and a base, b. the perimeter of the triangle is 15.7 inches, so the equation to solve is 2a + b = 15.7. if we recall that the sum of the lengths of any two sides of a triangle must be greater than the length of the third side, which lengths make sense for possible values of b? select two options.