If you are looking for the english version., it is "To Be".
Te correct si de Number 3
Explanation:
a. 3x+7= x-1
3x-x=-1-7
2x=-8
x=-8/2
x=-4
b. -2x+4x=3+4
2x=7
x= 7/2
x= 3.5
c.-3x+5x=1-5
2x=4
x=4/2
<em>x=2</em>
d. -x+1=4x-5-3x
1+5=4x-3x+1
6=2x
6/2=x
<em>x</em><em>=</em><em>3</em>