SAT Practice
10 + x is 5 more than 10
10 + x = 5 + 10 {created an equation}
10 + x = 15 {combined like terms}
-10
x=5
-10
{subtracted 10 from each side}
Find the value of 2x
2x
= 2(5) {substituted 5, in for x, into 2x}
= 10 {multiplied}
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SAT Practice
x = the number
a number divided by 2 equals that same number divided by 4
x
2
=
x
{created an equation from the verbal phrase}
4
4x = 2x
-2x
{cross-multiplied}
-2x
2x = 0
x=0
{subtracted 2x from each side}
{divided each side by 2}
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SAT Practice
© Mr. Sims
SAT Practice
25°
40°
∠m with ∠′ s p and x, together form 𝐯𝐞𝐫𝐭𝐢𝐜𝐚𝐥 𝐚𝐧𝐠𝐥𝐞𝐬
vertical angles are equal
40 = 25 + x {vertical angles are equal}
-25 -25
x = 15°
{subtracted 25 from each side}
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SAT Practice
Substitute the pairs into the equations.
If a true statement is made the pair
satisfies the equation.
for (-2 , -3)
y = 3x + 3
-3 = 3(-2) + 3
-3 = -6 + 3
-3 = -3 
for (0 , 3)
y = 3x + 3
3 = 3(0) + 3
3=0+3
3=3
for (1 , 6)
y = 3x + 3
6 = 3(1) + 3
6=3+3
6=6
for (2 , 9)
y = 3x + 3
9 = 3(2) + 3
9=6+3
9=9
for (4 , 15)
y = 3x + 3
15 = 3(4) + 3
15 = 12 + 3
15 = 15 
© Mr. Sims
SAT Practice
$450 per month on food is 25%
of entire monthly expenses
Find what number 450 is 25% of:
a = pb {a is the “part”, p is “percent”, b is “whole”}
450 = 0.25b {substituted into formula, 25% is 0.25}
b = $1,800 {divided each side by 0.25}
Find 20% of $1,800 {the car}:
a = pb {a is the “part”, p is “percent”, b is “whole”}
a = 0.2(1,800) {substituted into formula}
a = $360 {multiplied}
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