1 MEDIUM Find the value of $$z$$ : $$6z - 5 = 2z + 7$$

 2 MEDIUM Find the value of $$x$$ : $$4x + 2x + 8x = -7$$ 2-0.50.5-2None of the above

 3 MEDIUM Find the value of $$a$$ : $$7a - 5 = 3 - a$$