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2x + 5 = 35
2x = 35 - 5
2x = 30
x= 30/2
x= 15
B)
(x) + (x+1) = 51
x + x + 1 = 51
2x + 1= 51
2x = 51 -1
2x = 50
x = 50/2
x= 25
C)
2x + 1/2x + 15 = 99
2x + 1/2x = 99 - 15
2x + 1/2x = 84
2x + 0.5x = 84
2.5x = 84
x = 84/2.5
x= 33.6
D)
1/4x = 15
x/4 = 15
x = 15 * 4
x = 60