Question

enter the value of x that make the parallelogram a rhombus

Answer 1

a rhombus has 4 equal sides so 21 - x should equal 8x + 3

put them into a simultaneous equation and solve for x

21 - x = 8x + 3

21 - 3 = 8x + x

18 = 9x

x = 18 ÷ 9
x = 2

Answer 2

x is equal to 4 I think I’m not sure