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b. Dr persamaan diperoleh
4x = 88
x = 22
c. Masukan nilai x pada :
3x + 5 dan x-3
3x + 5 = 3 x 22 + 5 = 71
x - 3 = 22 - 3 = 19
4x+5-3=90
4x+2=90
4x=90-2
4x=88
x=88/4=22
c.3x=3.x=3.22=66
x=1.x=1.22=22