Who was the first person to do a math equation?.

We don't know. However, people have been doing at least basic math since the Neolithic periods. As civilizations came about, the first mathmaticians developed, often sons from  rich families who had an education and plenty of time on their hands(they were a few women, too, albeit not many) I hope this answer helps

Jade

Step-by-step explanation:

the answer is d on edge

step-by-step explanation:

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.