We can create a formula first.
X will be the unknown number
840= 357+x
-357 -357
483 = x
Hope this helps
By socializing with other people
<span>5 x 9
9 (3 x 3)
5 x 3 x 3 = 45</span>
The answer is 10 units. This is because you have to find X where 2x+10 just the same with the other side of the triangle.the triangle is also known as isosceles triangle in which two sides are equal to each other. You just have to equate it to the x+3. So 4x+30=2x+10 so x=10 units.
