Please help me out, i can not understand this, i will give a brainliest out to whoever can help me

Solve the system by the elimination method. 3x - 2y - 7 = 0 5x + y - 3 = 0 to eliminate y, the lcm is 2. which of the following is the resulting equations? 1.3x - 2y - 7 = 0 5x + y - 3 = 0 2.3x - 2y - 7 = 0 -10x - 2y + 6 = 0 3.3x - 2y - 7 = 0 10x + 2y - 6 = 0

9/10 divide by -3/15 as a mixed number

What is the name of a polygon that has four congruent sides and theses angle measures 60,120,60,120?