Someone , lol i've been tryna do the last too for so long, i think i am just

see explanation

Step-by-step explanation:

(a)

4 × 4 = 4²

(b)

5 × 5 × 5 × 5 =

(c)

3 × 7 × 7 × 7 × 7 = 3 ×

(d)

2 × 9 × 9 × 9 × 2 × 9 ← rearrange

= 2 × 2 × 9 × 9 × 9 × 9

= 2² ×

this linear equation would have just one solution.

step-by-step explanation:

the reason why this would have one solution is that it is an expression with just one variable. since that variable is not raised to a power, it will always have just one solution.