The the missing number so that the equation has infinitely many solutions will be 3.
<h3>How to illustrate the equation?</h3>
It should be noted that an equation shows the relationship that's exists between variables.
In this case, the missing number so that the equation has infinitely many solutions will be:
–3x _+= –3 (x–1)
-3(x - 1)
= -3x + 3
Therefore, the missing number is 3
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