I have 50 coins consisting of 50p and 20p coins. They add up to £19How many 50p coins and 20p coins do I have?

do you mean add both of the equations together

because if you do the answer is 10x-5

step-by-step explanation:

-2x + 7 = 7

subtract 7 from both sides.

-2x = 0

divide both sides by -2.

x = 0

38.6°

step-by-step explanation:

resultant is 10 pound

smaller force = 8 pound

angle formed = tan⁻¹(

                        =tan⁻¹(

                          =tan⁻¹(0.8)

                        =38.6°