1 EASY $$r = 7$$ What is the value of $$r$$?

 2 EASY $$r = 5 + 10$$ What is the value of $$r$$?

 3 MEDIUM $$n = 22 - 7$$ What is the value of $$n$$? 291516053

 4 MEDIUM $$z - 14 + 3z = 2$$ What is the value of $$4z$$?

 5 MEDIUM $$c = 21 + 90$$ What is the value of $$c$$?

 6 MEDIUM $$5t = 3t + 12$$ What is the value of $$t$$?

 7 HARD $$x + 7 = 10$$ What is the value of $$x$$? 31701012

 8 HARD $$c - 12 = 2c - 44$$ What is the value of $$c$$?

 9 HARD $$x + 44 = 3x + 14$$ What is the value $$x$$?

 10 HARD $$y = x + 2$$ and $$x = 2$$ What is the value of $$y$$?