Explicación paso a paso:
5x+4=49
5x= 49-4
5x= 45
x=45/5
x= 9
3x+1=31
3x=31-1
3x= 30
x= 30/3
x= 10
7x+1=36
7x= 36-1
7x= 35
x= 35/7
x= 5
9x+1=91
9x= 91-1
9x= 90
x= 90/9
2x+9=13
2x= 13-9
2x= 4
x=4/2
x= 2
8x+8=64
8x= 64-8
8x= 56
x=56/8
x= 7
3x+3=27
3x= 27-3
3x= 24
x= 24/3
x= 8
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Explicación paso a paso:
5x+4=49
5x= 49-4
5x= 45
x=45/5
x= 9
3x+1=31
3x=31-1
3x= 30
x= 30/3
x= 10
7x+1=36
7x= 36-1
7x= 35
x= 35/7
x= 5
9x+1=91
9x= 91-1
9x= 90
x= 90/9
x= 10
2x+9=13
2x= 13-9
2x= 4
x=4/2
x= 2
8x+8=64
8x= 64-8
8x= 56
x=56/8
x= 7
3x+3=27
3x= 27-3
3x= 24
x= 24/3
x= 8