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There are several things that prove global warming is an existing problem. One of the main pieces of evidence is the rise in global temperatures. The increased production of greenhouse gases has resulted ...

Earthquakes are caused by the release of tension that builds up at plate margins. They can be triggered at destructive, constructive and conservative boundaries. At destructive margins, tension builds up ...

Polar molecules are those that have permanent dipoles. A permanent dipole occurs due to a difference in the electronegativity of the atoms involved in the bond. You might not be familiar with the term ´el...

2kx + 6ky + 4kz

=2k (x + 3y + 2z)

6a + b = 16    Equation 1
5a - 2b = 19    Equation 2

Scale up one equation so both equations have same coeffient of one variable ie 2 times Equ 1

12a + 2b = 32
5a - 2b = 19