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1.- 2x+5=10+x
2x+x=10+5
3x=15
x=15/3 = 5<-------
2.- x/3 + 5 =10
x/3 +5 =0
x=15<--------
3.- 2x-11 = 10-5x
2x+5x = 10+11
7x=21
x=21/7 = 3<-----
1)- 2x + 5 = 10 + x
2x - x = 10-5
x=5
2)- x/3 + 5 = 10
x/3=10-5
x/3=5
x= 3. 5 =15
3)- 2x-11 = 10 - 5x
2x+5x=10+11
7x = 21
x=21/7=3