Question

x + 4 = 9
x = 4 - { } = 9 - { }
x = { }

Answer 1

x+4=9

x=9-4

x=5

it's your answer

I hope helps you❤❤

Answer 2

x + 4 = 9

=> x + 4 - {4} = 9 - {4}

=> x = {5}

hope it helps.