2 times of x is equal to 70. The given statement can be represented as 2x + 70 = 0.
7x×(−5yz)×2xz = ___
In a party room, 20 workers decorate 70 tables. Each table is decorated with 10 silver balloons and 15 gold balloons. Which equation could be used to find x, the total number of silver and gold balloons needed altogether to decorate all the tables?