3x - 5 = 20
Add '5' tp bpth sides
3x = 25
Divide both sides by ;3;/
x = 25/3 = 8 1/3 = 8.333.....
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Applying the systematic method, we get:-
3x-5+5=20-5(cancelling -5 from both sides)
3x=15
3x/3=15/3
Therefore, x=15
y = 100 - 4x ( a ) Find the value of y when x = 20.
Depends on the value of x if x is 1 then 10x + 20 = 30 if x is 2 then 10x + 20 = 40 if x is 3 then 10x + 20 = 50 if x is 4 then 10x + 20 = 60 if x is 5 then 10x + 20 = 70 if x is 10 then 10x + 20 = 120 And so on
x-14 = 20 x = 20+14 x = 34
x = 20
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