Question

a) Solve the following pair of equations x+y= 21 2x+4y = 60
b) Solve the equation 4x- 3= 13
c) Write 3/40 as a fraction with denominator as power of 10. also find the decimal form
d) 5 times a number and 4 times another number added together gives 47. 4 times the first number and 5 times the second number added together makes 43. What are the numbers?

Answer 1

x + y = 21

2x+4y=60

multiply (I) equation by 2

we get ;

y = -11

X=32