You can multiply the second equation by -2
-5x + y = 15 everything by -2
10x - 2y = -30
now you can solve them
2x + 2y = -6
10x - 2y = -30
y cancels
2x= -6
10x = -30
12x = -36
/12. /12
x = -3
now to solve for y you substitute x for -3
-5(-3) + y = 15
15 + y = 15
-15 -15
y= 0
The weight of the circle that is double the weight of the triangle is 20 grams.
<h3>How to find weight ?</h3>
The weight of the rectangle is 80 grams.
The weight of the triangle is double the weight of the weight of the circle.
A rectangle is made up of 2 triangles. Therefore,
weight of each triangle = 80 / 2 = 40 grams
Since, the weight of the triangle is double the weight of the circle, the weight of the circle can be calculated as follows:
weight of circle = 40 / 2
Therefore,
weight of the circle = 20 grams.
learn more on weight here: brainly.com/question/23312072
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Jasmine + ron =alicia + barry
Ron collects 3jasmine+10 more than jasmine
barry collects 2 jamsine
alicia collects 10 barry = 20 jasmine
4jasmine+10=22 jasmine
10=18 jasmine
jasmine = 1.8
ron =15.4
alicia=32
barry=3.2
First you multiply 6 times 413 which is 2478. Then you add -764.
The answer is 1714