Answer:
43
Step-by-step explanation:
43 is a prime number
ax - b = c
add b to both sides
ax - b + b = c + b
simplifying
ax = c + b
divide both sides by a
ax / a = (c + b) / a
x = (c + b) / a
77 m^2
area of parallelogram = base*height
A = 11*7
A = 77