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a) 2x+7=21
b) -3x+4=16
c) 2x-4=10
d) 2(x+1)=x
2x = 14
x=7
-3x = 12
x= -4
2x+2 = x
x=-2
2x=21-7
2x=14/÷2
-3x=16-4
-3x=12 /÷(-3)
x=-4
2x=10+4
2x=14/±2
2x+2=x
2x-x=-2
Proszę o naj!!!!!!!
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a) 2x+7=21
2x = 14
x=7
b) -3x+4=16
-3x = 12
x= -4
c) 2x-4=10
2x = 14
x=7
d) 2(x+1)=x
2x+2 = x
x=-2
a) 2x+7=21
2x=21-7
2x=14/÷2
x=7
b) -3x+4=16
-3x=16-4
-3x=12 /÷(-3)
x=-4
c) 2x-4=10
2x=10+4
2x=14/±2
x=7
d) 2(x+1)=x
2x+2=x
2x-x=-2
x=-2
Proszę o naj!!!!!!!