Question

If 2x+3y=7 and {a+b}x- {a+b-3}y=4a+b

Answer 1

Answer:

Step-by-step explanation:

A rock is any naturally occurring solid mass or aggregate of minerals or mineraloid matter. It is categorized by the minerals included, its chemical composition and the way in which it is formed. Rocks are usually grouped into three main groups: igneous rocks, metamorphic rocks and sedimentary rocks