I assume that you mean: the length is 7cm more than the width, and the perimeter is 74 cm.
If so, we can write down the following system, where l and w represent, respectively, the length and the width:
We can easily solve the second equation:
And finally solve for the length:
8.263-13.48= -5.217
I suggest using a calculator for math that is hard to work out in your head.
Answer:
7+4=11
Step-by-step explanation:
12/3 equalls 4 because the 12÷3=4.
To solve this, let's first convert the equation to standard form:
9 + (x/4) = 12
Now, let's solve for x:
9 + (x/4) = 12
9 + (x/4) - 9 = 12 - 9
x/4 = 3
x/4 * 4 = 3 * 4
x = 12
