How can I solve this system of equation with substitution 2a+2x=18 and a+3x=17

Answers

Answer 1

Answer: first solve for one variable
solve for a in second eqatn

minus 3x both sides
a=17-3x
sub 17-3x for a in first equaiton
2(17-3x)+2x=18
34-6x+2x=18
34-4x=18
minus 34 both sides
-4x=-16
divide both sides by -4
x=4
sub back
a=17-3x
a=17-3(4)
a=17-12
a=5

a is 5
x=4

WORK SECTION (without thoughts)
2a+2x=18 to a+x=9
a+3x=17

a=17-3x
(17-3x)+x=9
17-2x=9
-2x=-8
x=4

a=17-3(4)
a=17-12
a=5

x=4
a=5

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What is the value of x when 2x+3=3x-4

Answers

2x+3=3x-4
try to isolate the x term
you must do the same thing to both sides or else it won't be equal anymore

2x+3=3x-4
add 4 to both sides
2x+3+4=3x+4-4
2x+7=3x+0
subtract 2x from both sides
2x-2x+7=3x-2x
0+7=x
7=x

the answer is x=7

$2x+3=3x-4 \ \ \ |-3x \ \wedge \ -3 \n \n -x=-7 \n \n x=7$

What are the partial products of 62 times 45

Answers

if u mean 62 times 45 on its own, then the answer is 2790. hope that helped!!

62x45=2,790 that is right answer hope it helps

Please help me use the attachment to see the question

Answers

$(m^(2) -m+3)+(m-1)$
$= m^(2) -m+3+m-1$ . . . . . . . . (opening the brackets)
$= m^(2) -m+m+3-1$ . . . . . . . . (collecting like terms)
$= m^(2) +2$

100.5 divided by 1.5

Answers

the answer to 100.5 divided by 1.5 is 67

How many milliliters equal 2631 cm3? A. 2.631 B. 26,310 C. 2,631,000 D. 2631

Answers

2631 cm^3= 2631 mL, because 1 cm^3= 1 mL.

The answer is D. 2631~

yep the answer D. 2631 hope it helped

In a salsa recipe, the number of tomatoes added is proportional to the amount of salt added. This graph shows the relationship.What is the unit rate for the situation?

A.

3 tomatoes per teaspoon of salt

B.

6 tomatoes per teaspoon of salt

C.

18 tomatoes per teaspoon of salt

D.

108 tomatoes per teaspoon of salt