Rozwiąż i sprawdż: a) 5x-7=4x-12 b) 24+15x=(-5)-5x c) 7t-23=2+4t d) (-w)-12=(-3w)-22 e) 9s-6=(-1)+8s
a) 5x-7=4x-12 /+7
5x=4x-7/-4x
x=-7
b) 24+15x=(-5)-5x/-24
15x=-29-5x/+5X
20X=-29/:20
x= 29/20= 1całość i 9/20
c) 7t-23=2+4t/+23 7t=25+4t /-4t
3t=25/3
t= 8 całości i 1/3
d) (-w)-12=(-3w)- 22/+3w
2w-12=-22/+12
2w=-2/:2
w=-1
e) 9s-6=(-1)+8s /+6
9s=5+8s/-8s
s=5
koniec :)
a) 5x-7=4x-12 /-4x
x-7=-12/+7
x=-5
L=5*(-5)-7=-32
P=4*(-5)-12=-32
L=P
b) 24+15x=(-5)-5x /+5
29+15x=-5x /-15x
29=-20x /:(-20)
x=-1,45
L=24+15*(-1,45)=2,25
P=-5-5*(-1,45)=-5+7,25=2,25
c) 7t-23=2+4t /-4t
3t-23=2 /+23
3t=25 /:3
t=25/3
L=7*25/3-23=35 i 1/3
P=2+25/3*4=35 i 1/3
d) (-w)-12=(-3w)-22 /+3w
2w-12=-22 /+12
2w=-10 /:2
w=-5
L=(-(-5))-12=5-12=-7
P=(-(3*(-5))-22=15-22=-7
e) 9s-6=(-1)+8s /-8s
s-6=-1 /+6
L=9*5-6=39
P=-1+8*5=39
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a) 5x-7=4x-12 /+7
5x=4x-7/-4x
x=-7
b) 24+15x=(-5)-5x/-24
15x=-29-5x/+5X
20X=-29/:20
x= 29/20= 1całość i 9/20
c) 7t-23=2+4t/+23
7t=25+4t /-4t
3t=25/3
t= 8 całości i 1/3
d) (-w)-12=(-3w)- 22/+3w
2w-12=-22/+12
2w=-2/:2
w=-1
e) 9s-6=(-1)+8s /+6
9s=5+8s/-8s
s=5
koniec :)
a) 5x-7=4x-12 /-4x
x-7=-12/+7
x=-5
L=5*(-5)-7=-32
P=4*(-5)-12=-32
L=P
b) 24+15x=(-5)-5x /+5
29+15x=-5x /-15x
29=-20x /:(-20)
x=-1,45
L=24+15*(-1,45)=2,25
P=-5-5*(-1,45)=-5+7,25=2,25
L=P
c) 7t-23=2+4t /-4t
3t-23=2 /+23
3t=25 /:3
t=25/3
L=7*25/3-23=35 i 1/3
P=2+25/3*4=35 i 1/3
L=P
d) (-w)-12=(-3w)-22 /+3w
2w-12=-22 /+12
2w=-10 /:2
w=-5
L=(-(-5))-12=5-12=-7
P=(-(3*(-5))-22=15-22=-7
L=P
e) 9s-6=(-1)+8s /-8s
s-6=-1 /+6
s=5
L=9*5-6=39
P=-1+8*5=39
L=P