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3 years ago

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12 pts!! solve for x. 4/5 (2x + 5) − 4 =1

2 answers:

tensa zangetsu [6.8K]3 years ago

8 0

4/5 (2x + 5) − 4 =1
4/5(2x +5) = 1 +4
4/5 (2x +5) = 5
2x + 5 = 5 / (4/5)
2x + 5 = 5 (5/4)
2x + 5 = 25/4
2x = 25/4 - 5
2x = 25/4 - 20/4
2x = 5/4
x = (5/4) / 2
x = (5/4) (1/2)
x = 5/8
x = 0.625

seropon [69]3 years ago

7 0

Let's solve for f.<span><span><span><span><span><span><span><span>fo</span>r</span>x</span><span>(0.4)</span></span>5</span><span>(<span><span>2x</span>+5</span>)</span></span>−4</span>=1</span>Step 1: Add 4 to both sides.<span><span><span><span><span><span><span><span>0.16f</span>o</span>r</span><span>x2</span></span>+<span><span>25</span><span><span><span>fo</span>r</span>x</span></span></span>−4</span>+4</span>=<span>1+4</span></span><span><span><span><span><span><span>0.16f</span>o</span>r</span><span>x2</span></span>+<span><span>25</span><span><span><span>fo</span>r</span>x</span></span></span>=5</span>Step 2: Factor out variable f.<span><span>f<span>(<span><span><span><span><span>0.8o</span>r</span><span>x2</span></span>+<span><span><span>2o</span>r</span>x</span></span>5</span>)</span></span>=5</span>Step 3: Divide both sides by (0.8orx^2+2orx)/5.<span><span><span>f<span>(<span><span><span><span><span>0.8o</span>r</span><span>x2</span></span>+<span><span><span>2o</span>r</span>x</span></span>5</span>)</span></span><span><span><span><span><span>0.8o</span>r</span><span>x2</span></span>+<span><span><span>2o</span>r</span>x</span></span>5</span></span>=<span>5<span><span><span><span><span>0.8o</span>r</span><span>x2</span></span>+<span><span><span>2o</span>r</span>x</span></span>5</span></span></span><span>f=<span>25<span><span><span><span>0.8o</span>r</span><span>x2</span></span>+<span><span><span>2o</span>r</span>x</span></span></span></span>Answer:<span>f=<span>25<span><span><span><span>0.8o</span>r</span><span>x2</span></span>+<span><span><span>2o</span>r</span><span>x</span></span></span></span></span>

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