Write the following rational numbers in decimal form using Theorem 1.4. 13 15 143 1 (1) (I) 23 23 5² 7218 325² (V) 25 16 110
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Step-by-step explanation:
Explanation:
Make
y
the subject in one equation:
2
x
+
y
=
12
=>
y
=
12
−
2
x
Substitute into the second equation and solve for
x
:
x
+
y
=
7
=>
x
+
12
−
2
x
=
7
=>
x
=
5
Use this value to solve for
y
:
x
+
y
=
7
=>
5
+
y
=
7
=>
y
=
2
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