Final answer:
The equation 7x - 4 = 5x + 2x - 4 has many solutions.
Step-by-step explanation:
To solve the equation 7x - 4 = 5x + 2x - 4, we first combine like terms on each side of the equation. This gives us 7x - 4 = 7x - 4. Notice that the variables cancel out in this equation, leaving us with -4 = -4. This means that the equation is true, regardless of the value of x. Therefore, the equation has many solutions.
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