They are equal, 8 x 7 = 56 and 7 x 7 = 49
Take to total number of people attending and subtract the number of adults. The remainder are the children
2,451 - 745 = 1,706
In standard form the two equations are
7x +y = 5
7x +y = -5
The equations describe lines that are parallel.
Perimeter is the sum of all the sides. So we can set up an equation:
Now solve for 'x', combine like terms:
When it comes to terms with variables it's just like normal addition but we keep the variable:
So we have:
Add:
Subtract 7x to both sides:
Subtract 4 to both sides:
Divide 5 to both sides: