$a\text{)}6x-2+x=5x+4$  

$7x-2=5x+4\mid -5x$  

$2x-2=4\mid +2$  

$2x=6\mid :2$  

$x=3$  


Sprawdzenie: 

$L=6\cdot 3-2+3=18-2+3=16+3=19$  

$P=5\cdot 3+4=15+4=19$  

$L=P$  

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$b\text{)}10=2-4y-y+3$  

$10=5-5y\mid -5$  

$5=-5y\mid :5$  

$y=1$  

Sprawdzenie:

$L=10$  

$P=2-4\cdot \left(-1\right)-1+3=2+4-1+3=10$  

$L=P$  

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$c\text{)}3+2\left(x-1\right)=1$  

$3+2x-2=1$  

$2x+1=1\mid -1$  

$2x=0$  

$x=0$  

Sprawdzenie:

$L=3+2\left(0-1\right)=3+2\cdot \left(-1\right)=3-2=1$  

$P=1$  

$L=P$  

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$d\text{)}4-3\left(5y+1\right)=-29$  

$4-15y-3=-29$  

$1-15y=-29\mid -1$  

$-15y=-30\mid :\left(-15\right)$  

$y=2$  

Sprawdzenie:

$L=4-3\left(5\cdot 2+1\right)=4-3\left(10+1\right)=4-3\cdot 11=4-33=-29$  

$P=-29$  

$L=P$  

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$e\text{)}5x-8=0,8+4,6x\mid -4,6x$  

$0,4x-8=0,8\mid +8$  

$0,4x=8,8\mid :\left(0,4\right)$  

$x=22$  

Sprawdzenie:

$L=5\cdot 22-8=110-8=102$  

$P=0,8+4,6\cdot 22=0,8+101,2=102$  

$L=P$  

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$f\text{)}-y+10,9=1,7y+0,1\mid -0,1$  

$-y+10,8=1,7y\mid +y$  

$10,8=2,7y\mid :2,7$  

$y=4$  

Sprawdzenie:

$L=-4+10,9=6,9$  

$P=1,7\cdot 4+0,1=6,8+0,1=6,9$  

$L=P$