Answer:
a) x = 260
b) g = 218
c) z = 30
d) h = 5
Step-by-step explanation:
a) [tex]x-68=192[/tex]
Predict a number; let's say x = 225
[tex]225-68=192\\157=192[/tex]
Too low; try with a higher number; let's say x = 270
[tex]270-68=192\\202=192[/tex]
Too high, we're closer.
x = 260
[tex]260-68=192\\192=192[/tex]
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b) [tex]g+33=251[/tex]
let's say g = 230
[tex]230+33=251\\263=251[/tex]
Too high. Try g = 221
[tex]221+33=251\\254=251[/tex]
We're almost there. Let's try with g = 218
[tex]218+33=251\\251=251[/tex]
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c) [tex]3z-16=74[/tex]
Let's try with z = 15
[tex]3(15)-16=74\\45-16=74\\29=74[/tex]
Too low; try a higher number. z = 30
[tex]3(30)-16=74\\90-16=74\\74=74[/tex]
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d) [tex]15h+9=84[/tex]
Let's try with h = 6
[tex]15(6)+9=84\\90+9=84\\99=84[/tex]
Too high; let's try with h = 5
[tex]15(5)+9=84\\75+9=84\\84=84[/tex]
