To solve the equation ◂=▸5x3=−135, you would first use the BLANK operation of BLANK by BLANK to get the equation x3=−27. You would then use the inverse operation of x3, which is taking BLANK the of both sides. That leaves us BLANK solution(s) for x. The solution(s): x = BLANK

The operation used is division, by dividing both sides by 5. This simplifies the equation to x^3 = -27. To isolate x, we take the cube root of both sides. The cube root of -27 is -3 as -3 * -3 * -3 = -27. Therefore, the solution is x = -3.