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x = 4-3
x = 1
b.7x -19=2
7x = 19+2
x = 21/7
x = 3
c.½x=5
x = 5/½
x = 10
d.
{5 + 3x}/2= 7
5 + 3x = 2(7)
3x = 14 - 5
x = 9/3
x = 3